Determinism is a philosophy stating that for everything that happens there are conditions such that, given them, nothing else could happen. Different versions of this theory depend upon various alleged connections, and interdependencies of things and events, asserting that these hold without exception. Deterministic theories throughout the history of philosophy have sprung from diverse motives and considerations, some of which overlap. They can be understood in relation to their historical significance and alternative theories. Some forms of determinism can be tested empirically with ideas stemming from physics and the philosophy of physics. The opposite of determinism is some kind of indeterminism (otherwise called nondeterminism). Determinism is often contrasted with free will.

Determinism is often taken to mean simply causal determinism: an idea known in physics as cause-and-effect. It is the concept that events within a given paradigm are bound by causality in such a way that any state (of an object or event) is completely determined by prior states. This can be distinguished from other varieties of determinism mentioned below. Other debates often concern the scope of determined systems, with some maintaining that the entire universe (or multiverse) is a single determinate system and others identifying other more limited determinate systems.^{[clarification needed]} Within numerous historical debates, many varieties and philosophical positions on the subject of determinism exist. This includes debates concerning human action and free will, where opinions might be sorted as compatibilistic and incompatibilistic.

Determinism should not be confused with self-determination of human actions by reasons, motives, and desires. Determinism rarely requires that perfect prediction be practically possible - only prediction in theory.

Varieties[link]

This article needs attention from an expert on the subject. Please add a reason or a talk parameter to this template to explain the issue with the article. WikiProject Philosophy may be able to help recruit an expert. (July 2011)

Below are some of the more common viewpoints meant by, or confused with "Determinism".

Many philosophical theories of determinism frame themselves with the idea that reality follows a sort of predetermined path

Causal (or Nomological) determinism^[1] and related Predeterminism propose that there is an unbroken chain of prior occurrences stretching back to the origin of the universe. The relation between events may not be specified, nor the origin of that universe. Causal determinists believe that there is nothing uncaused or self-caused. Quantum mechanics poses a serious challenge to this view (see 'Arguments' section below). Causal determinism is sometimes illustrated by the thought experiment of Laplace's demon. Historical determinism (a sort of path dependence) can also be synonymous with causal determinism.

Necessitarianism is very related to the causal determinism described above. It is a metaphysical principle that denies all mere possibility; there is exactly one way for the world to be. Leucippus claimed there were no uncaused events, and that everything occurs for a reason and by necessity.^[2]

Fatalism is normally distinguished from "determinism".^[3] Fatalism is the idea that everything is fated to happen, so that humans have no control over their future. Notice that fate has arbitrary power. Fate also need not follow any causal or otherwise deterministic laws.^[1] Types of Fatalism include Theological determinism and the idea of predestination, where there is a God who determines all that humans will do. This may be accomplished either by knowing their actions in advance, via some form of omniscience^[4] or by decreeing their actions in advance.^[5]

Logical determinism or Determinateness is the notion that all propositions, whether about the past, present, or future, are either true or false. Note that one can support Causal Determinism without necessarily supporting Logical Determinism and vice versa (depending on one's views on the nature of time, but also randomness). The problem of free will is especially salient now with Logical Determinism: how can choices be free, given that propositions about the future already have a truth value in the present (i.e. it is already determined as either true or false)? This is referred to as the problem of future contingents.

Adequate determinism focuses on the fact that, even without a full understanding of microscopic physics, we can predict the distribution of 1000 coin tosses

Often synonymous with Logical Determinism are the ideas behind Spatio-temporal Determinism or Eternalism: the view of special relativity. J. J. C. Smart, a proponent of this view, uses the term "tenselessness" to describe the simultaneous existence of past, present, and future. In physics, the "block universe" of Hermann Minkowski and Albert Einstein assumes that time is a fourth dimension (like the three spatial dimensions). In other words, all the other parts of time are real, like the city blocks up and down a street, although the order in which they appear depends on the driver (see Rietdijk–Putnam argument).

Adequate determinism is the idea that quantum indeterminacy can be ignored for most macroscopic events. This is because of quantum decoherence. Random quantum events "average out" in the limit of large numbers of particles (where the laws of quantum mechanics asymptotically approach the laws of classical mechanics).^[6] Stephen Hawking explains a similar idea: he says that the microscopic world of quantum mechanics is one of determined probabilities. That is, quantum effects rarely alter the predictions of classical mechanics, which are quite accurate (albeit still not perfectly certain) at larger scales.^[7] Something as large as an animal cell, then, would be "adequately determined" (even in light of quantum indeterminacy).

Determined by nature or nurture[link]

Nature and nurture interact in humans. A scientist looking at a sculpture after some time does not ask whether we are seeing the effects of the starting materials OR environmental influences.

Although some of the above forms of determinism concern human behaviors and cognition, others frame themselves as an answer to the Nature or Nurture debate. They will suggest that one factor will entirely determine behavior. As scientific understanding has grown, however, the strongest versions of these theories have been widely rejected as a single cause fallacy.^[8]

In other words, the modern deterministic theories attempt to explain how the interaction of both nature and nurture is entirely predictable. The concept of heritability has been helpful to make this distinction.

Biological determinism, sometimes called Genetic determinism, is the idea that each of our behaviors, beliefs, and desires are fixed by our genetic nature.

Behaviorism is the idea that all behavior can be traced to specific causes—either environmental or reflexive. This Nurture-focused determinism was developed by John B. Watson and B. F. Skinner.

Cultural determinism or social determinism is the nurture-focused theory that it is the culture in which we are raised that determines who we are.

Environmental determinism is also known as climatic or geographical determinism. It holds the view that the physical environment, rather than social conditions, determines culture. Supporters often also support Behavioral determinism. Key proponents of this notion have included Ellen Churchill Semple, Ellsworth Huntington, Thomas Griffith Taylor and possibly Jared Diamond, although his status as an environmental determinist is debated.^[9]

Factor priority[link]

A technological determinist might suggest that technology, like the mobile phone, is the greatest factor shaping human civilization.

Other 'deterministic' theories actually seek only to highlight the importance of a particular factor in predicting the future. These theories often use the factor as a sort of guide or constraint on the future. They need not suppose that complete knowledge of that one factor would allow us to make perfect predictions.

Psychological determinism can mean that humans must act according to reason, but it can also be synonymous with some sort of Psychological egoism. The latter is the view that humans will always act according to their perceived best interest.

Linguistic determinism claims that our language determines (at least limits) the things we can think and say and thus know. The Sapir–Whorf hypothesis argues that individuals experience the world based on the grammatical structures they habitually use.

Economic determinism is the theory which attributes primacy to the economic structure over politics in the development of human history. It is associated with the dialectical materialism of Karl Marx.

Technological determinism is a reductionist theory that presumes that a society's technology drives the development of its social structure and cultural values. Media determinism, a subset of technological determinism, is a philosophical and sociological position which posits the power of the media to impact society. Two leading media determinists are the Canadian scholars Harold Innis and Marshall McLuhan.

Free will and determinism[link]

A table showing the different positions related to free will and determinism

Philosophers have argued that either Determinism is true or Indeterminism is true, but also that Free Will either exists or it does not. This creates four possible positions. Compatibilism refers to the view that free will is, in some sense, compatible with Determinism. The three Incompatibilist positions, on the other hand, deny this possibility. They instead suggest there is a dichotomy between determinism and free will (only one can be true).

To the Incompatibilists, one must choose either free will or Determinism, and maybe even reject both. The result is one of three positions:

• Metaphysical Libertarianism (free will, and no determinism) a position not to be confused with the more commonly cited Political Libertarianism.
• Hard Determinism (Determinism, and no free will).
• Hard Indeterminism (No Determinism, and no free will either).

Thus, although many Determinists are Compatibilists, calling someone a 'Determinist' is often done to denote the 'Hard Determinist' position.

The Standard argument against free will, according to philosopher J. J. C. Smart focuses on the implications of Determinism for 'free will'.^[10] He suggests that, if determinism is true, all our actions are predicted and we are not free; if determinism is false, our actions are random and still we do not seem free.

In his book, The Moral Landscape, author and neuroscientist Sam Harris mentions some ways that determinism and modern scientific understanding might challenge the idea of a contra-causal free will. He offers one thought experiment where a mad scientist represents determinism. In Harris' example, the mad scientist uses a machine to control all the desires, and thus all the behaviour, of a particular human. Harris believes that it is no longer as tempting, in this case, to say the victim has "free will". Harris says nothing changes if the machine controls desires at random - the victim still seems to lack free will. Harris then argues that we are also the victims of such unpredictable desires (but due to the unconscious machinations of our brain, rather than those of a mad scientist). This implicitly assumes a philosophy of materialism, which could be disputed along with Harris's hard determinism. Based on this introspection, he writes "This discloses the real mystery of free will: if our experience is compatible with its utter absence, how can we say that we see any evidence for it in the first place?"^[11] adding that "Whether they are predictable or not, we do not cause our causes."^[12] That is, he believes there is compelling evidence of absence of free will.

Research has found that reducing a person's belief in free will can make them less helpful and more aggressive.^[13] This could occur because the individual's sense of Self-efficacy suffers.

Determinism and mind[link]

Some determinists argue that materialism does not present a complete understanding of the universe, because while it can describe determinate interactions among material things, it ignores the minds or souls of conscious beings.

A number of positions can be delineated:

1. Immaterial souls are all that exist (Idealism).
2. Immaterial souls exist and exert a non-deterministic causal influence on bodies. (Traditional free-will, interactionist dualism).^[14][15]
3. Immaterial souls exist, but are part of deterministic framework.
4. Immaterial souls exist, but exert no causal influence, free or determined (epiphenomenalism, occasionalism)
5. Immaterial souls do not exist — there is no mind-body dichotomy, and there is a Materialistic explanation for intuitions to the contrary.

Another topic of debate is the implication that Determinism has on morality. Hard determinism (a belief in determinism, and not free will) is particularly criticized for seeming to make traditional moral judgments impossible. Some philosophers, however, find this an acceptable conclusion.

Philosopher and incompatibilist Peter van Inwagen introduces this thesis as such:

Argument that Free Will is Required for Moral Judgments

1. The moral judgment that you shouldn’t have done X implies that you should have done something else instead
2. That you should have done something else instead implies that there was something else for you to do
3. That there was something else for you to do implies that you could have done something else
4. That you could have done something else implies that you have free will
5. If you don’t have free will to have done other than X we cannot make the moral judgment that you shouldn’t have done X.^[16]

History[link]

Some of the main philosophers who have dealt with this issue are Marcus Aurelius, Omar Khayyám, Thomas Hobbes, Baruch Spinoza, Gottfried Leibniz, David Hume, Baron d'Holbach (Paul Heinrich Dietrich), Pierre-Simon Laplace, Arthur Schopenhauer, William James, Friedrich Nietzsche, Albert Einstein, Niels Bohr, and, more recently, John Searle, Ted Honderich, and Daniel Dennett.

Mecca Chiesa notes that the probabilistic or selectionistic determinism of B.F. Skinner comprised a wholly separate conception of determinism that was not mechanistic at all. Mechanistic determinism assumes that every event has an unbroken chain of prior occurrences, but a selectionistic or probabilistic model does not.^[17][18]

Eastern tradition[link]

This section may contain original research. Please improve it by verifying the claims made and adding references. Statements consisting only of original research may be removed. More details may be available on the talk page. (December 2010)

The idea that the entire universe is a deterministic system has been articulated in both Eastern and non-Eastern religion, philosophy, and literature.

In I Ching and Philosophical Taoism, the ebb and flow of favorable and unfavorable conditions suggests the path of least resistance is effortless (see wu wei).

In the philosophical schools of India, the concept of precise and continual effect of laws of Karma on the existence of all sentient beings is analogous to western deterministic concept. Karma is the concept of "action" or "deed" in Indian religions. It is understood as that which causes the entire cycle of cause and effect (i.e., the cycle called saṃsāra) originating in ancient India and treated in Hindu, Jain, Sikh and Buddhist philosophies. Karma is considered predetermined and deterministic in the universe, with the exception of a human, who through free will can influence the future. See Karma in Hinduism.^{[citation needed]}

Western tradition[link]

The notion of determinism was introduced into the West through the adoption of the Abrahamic religions. The Christian concept of predestination led to the first Western debates over determinism, an issue that is known in theology as the paradox of free will. The Jewish philosopher Moses Maimonides said of the determinstic implications of an omniscient god:^[19] "Does God know or does He not know that a certain individual will be good or bad? If thou sayest 'He knows', then it necessarily follows that [that] man is compelled to act as God knew beforehand he would act, otherwise God's knowledge would be imperfect.…"^[20]

Determinism in the West is often associated with Newtonian physics, which depicts the physical matter of the universe as operating according to a set of fixed, knowable laws. The "billiard ball" hypothesis, a product of Newtonian physics, argues that once the initial conditions of the universe have been established, the rest of the history of the universe follows inevitably. If it were actually possible to have complete knowledge of physical matter and all of the laws governing that matter at any one time, then it would be theoretically possible to compute the time and place of every event that will ever occur (Laplace's demon). In this sense, the basic particles of the universe operate in the same fashion as the rolling balls on a billiard table, moving and striking each other in predictable ways to produce predictable results.

Whether or not it is all-encompassing in so doing, Newtonian mechanics deals only with caused events, e.g.: If an object begins in a known position and is hit dead on by an object with some known velocity, then it will be pushed straight toward another predictable point. If it goes somewhere else, the Newtonians argue, one must question one's measurements of the original position of the object, the exact direction of the striking object, gravitational or other fields that were inadvertently ignored, etc. Then, they maintain, repeated experiments and improvements in accuracy will always bring one's observations closer to the theoretically predicted results. When dealing with situations on an ordinary human scale, Newtonian physics has been so enormously successful that it has no competition. But it fails spectacularly as velocities become some substantial fraction of the speed of light and when interactions at the atomic scale are studied. Before the discovery of quantum effects and other challenges to Newtonian physics, "uncertainty" was always a term that applied to the accuracy of human knowledge about causes and effects, and not to the causes and effects themselves.

Newtonian mechanics as well as any following physical theories are results of observations and experiments, and so they describe "how it all works" within a tolerance. However, old western scientists believed if there are any logical connections found between an observed cause and effect, there must be also some absolute natural laws behind. Belief in perfect natural laws driving everything, instead of just describing what we should expect, led to searching for a set of universal simple laws that rule the world. This movement significantly encouraged deterministic views in western philosophy.^[21]

Modern perspectives[link]

Cause and effect[link]

Since the early twentieth century when astronomer Edwin Hubble first hypothesized that redshift shows the universe is expanding, prevailing scientific opinion has been that the current state of the universe is the result of a process described by the Big Bang. Many theists and deists claim that it therefore has a finite age, pointing out that something cannot come from nothing (the definition of nothing, however, is problematic at the most arcane level of physics). The big bang does not describe from where the compressed universe came; instead it leaves the question open. Different astrophysicists hold different views about precisely how the universe originated (Cosmogony). The philosophical argument here would be that the big bang triggered every single action, and possibly mental thought, through the system of cause and effect.

Generative processes[link]

Although it was once thought by scientists that any indeterminism in quantum mechanics occurred at too small a scale to influence biological or neurological systems, there is evidence that nervous systems are indeterministic.^{[citation needed]} It is unclear what implications this has for free will given various possible reactions to the standard problem in the first place.^[22] Certainly not all biologists grant determinism: Christof Koch argues against it, and in favour of libertarian free will, by making arguments based on Generative processes (emergence).^[23] Other proponents of emergentist or generative philosophy, cognitive sciences and evolutionary psychology, argue that determinism is true.^{[24][25][26][27]} They suggest instead that an illusion of free will is experienced due to the generation of infinite behaviour from the interaction of finite-deterministic set of rules and parameters. Thus the unpredictability of the emerging behaviour from deterministic processes leads to a perception of free will, even though free will as an ontological entity does not exist.^{[24][25][26][27]} Certain experiments looking at the Neuroscience of free will can be said to support this possibility.

In Conway's Game of Life, the interaction of just 4 simple rules creates patterns that seem somehow "alive".

As an illustration, the strategy board-games chess and Go have rigorous rules in which no information (such as cards' face-values) is hidden from either player and no random events (such as dice-rolling) happen within the game. Yet, chess and especially Go with its extremely simple deterministic rules, can still have an extremely large number of unpredictable moves. By this analogy, it is suggested, the experience of free will emerges from the interaction of finite rules and deterministic parameters that generate nearly infinite and practically unpredictable behaviour. In theory, if all these events were accounted for, and there were a known way to evaluate these events, the seemingly unpredictable behaviour would become predictable.^{[24][25][26][27]} Another hands-on example of generative processes is John Horton Conway's playable Game of Life.^[28] Nassim Taleb is wary of such models, and coined the term "Ludic fallacy".

Mathematical models[link]

Many mathematical models of physical systems are deterministic. This is true of most models involving differential equations (notably, those measuring rate of change over time). Mathematical models that are not deterministic because they involve randomness are called stochastic. Because of sensitive dependence on initial conditions, some deterministic models may appear to behave non-deterministically; in such cases, a deterministic interpretation of the model may not be useful due to numerical instability and a finite amount of precision in measurement. Such considerations can motivate the consideration of a stochastic model even though the underlying system is governed by deterministic equations.^[29][30][31]

Quantum mechanics and classical physics[link]

Day-to-day physics[link]

Since the beginning of the 20th century, quantum mechanics - the physics of the extremely small - has revealed previously concealed aspects of events. Before that, Newtonian physics - the physics of everyday life - dominated. Taken in isolation (rather than as an approximation to quantum mechanics), Newtonian physics depicts a universe in which objects move in perfectly determined ways. At the scale where humans exist and interact with the universe, Newtonian mechanics remain useful, and make relatively accurate predictions (e.g. calculating the trajectory of a bullet). In theory, absolute knowledge of the forces accelerating a bullet could produce an absolutely accurate prediction of its path. Modern quantum mechanics, however, casts reasonable doubt on this main thesis of determinism.

Relevant is the fact that certainty is never absolute in practice (and not just because of David Hume's problem of induction). The equations of Newtonian mechanics can exhibit sensitive dependence on initial conditions. This is an example of the Butterfly effect, which is one of the subjects of chaos theory. The idea is that something even as small as a butterfly could cause a chain reaction leading to a hurricane years later. Consequently, even a very small error in knowledge of initial conditions can result in arbitrarily large deviations from predicted behavior. Chaos theory thus explains why it may be practically impossible to predict real life, whether determinism is true or false. On the other hand, the issue may not be so much about human abilities to predict or attain certainty as much as it is the nature of reality itself. For that, a closer, scientific look at nature is necessary.

Quantum world[link]

The quantum physics used at atomic scales works differently in many ways from Newtonian physics. Indeed, some findings are unintuitive and difficult to believe. Physicist Aaron D. O'Connell explains that understanding our universe, at such small scales as atoms, requires a different logic than day to day life. O'Connell does not deny that it is all interconnected: the scale of human existence ultimately does emerge from the quantum scale. O'Connell argues that we must simply use different models and constructs when dealing with the quantum world.^[32] As a result, these branches of physics are sometimes misrepresented or misunderstood, making some claims seem more scientific than they are (e.g. The Secret (book)^[33] or What The Bleep Do We Know!?^[34]). Quantum mechanics remain, however, the product of careful application of the scientific method, logic and empiricism. For instance, Werner Heisenberg's carefully formulated Uncertainty principle explains why the paths of objects can only be predicted in a probabilistic way (the reasoning is nuanced, involving, among other things, the observer effect).

Although it is not possible to predict the trajectory of any one particle, they all obey determined probabilities which do permit some prediction.

This is where statistical mechanics come into play, and where physicists begin to require rather unintuitive mental models: A particle's path simply cannot be exactly specified in its full quantum description. "Path" is a classical, practical attribute in our every day life, but one which quantum particles do not meaningfully possess. The probabilities discovered in quantum mechanics do nevertheless arise from measurement (of the perceived path of the particle). As Stephen Hawking explains, the result is not traditional determinism, but rather determined probabilities.^[35] In some cases, a quantum particle may indeed trace an exact path, and the probability of finding the particles in that path is one.^{[clarification needed]} In fact, as far as prediction goes, the quantum development is at least as predictable as the classical motion, but the key is that it describes wave functions that cannot be easily expressed in ordinary language. As far as the thesis of determinism is concerned, these probabilities, at least, are quite determined. These findings from quantum mechanics have found many applications, and allow us to build transistors and lasers. Put another way: personal computers, Blu-ray players and the internet all work because humankind discovered the determined probabilities of the quantum world.^[33] None of that should be taken to imply that other aspects of quantum mechanics are not still up for debate.

On the topic of predictable probabilities, the double-slit experiments are a popular example. Photons are fired one-by-one through a double-slit apparatus at a distant screen. Curiously, they do not arrive at any single point, nor even the two points lined up with the slits (the way you might expect of bullets fired by a fixed gun at a distant target). Instead, the light arrives in varying concentrations at widely separated points, and the distribution of its collisions with the target can be calculated reliably. In that sense the behavior of light in this apparatus is deterministic, but there is no way to predict where in the resulting interference pattern any individual photon will make its contribution (although, there may be ways to use weak measurement to acquire more information without violating the Uncertainty principle).

Some (including Albert Einstein) argue that our inability to predict any more than probabilities is simply due to ignorance.^[36] The idea is that, beyond the conditions and laws we can observe or deduce, there are also hidden factors or "hidden variables" that determine absolutely in which order photons reach the detector screen. They argue that the course of the universe is absolutely determined, but that humans are screened from knowledge of the determinative factors. So, they say, it only appears that things proceed in a merely probabilistically determinative way. In actuality, they proceed in an absolutely deterministic way. These matters continue to be subject to some dispute. A critical finding was that quantum mechanics can make statistical predictions which would be violated if local hidden variables really existed. There have been a number of experiments to verify such predictions, and so far they do not appear to be violated. This would suggest there are no hidden variables, although many physicists believe better experiments are needed to conclusively settle the issue (see also Bell test experiments). Furthermore, it is possible to augment quantum mechanics with non-local hidden variables to achieve a deterministic theory that is in agreement with experiment. An example is the Bohm interpretation of quantum mechanics. This debate is relevant because it is easy to imagine specific situations in which the arrival of an electron at a screen at a certain point and time would trigger one event, whereas its arrival at another point would trigger an entirely different event (e.g. see Schrödinger's cat - a thought experiment used as part of a deeper debate).

Thus, the world of quantum physics casts reasonable doubt on the traditional determinism that is so intuitive in classical, Newtonian physics. At the small scales, our reality does not seem to be absolutely determined. Yet this was precisely the subject of the famous Bohr–Einstein debates between Einstein and Niels Bohr. There is still no consensus. In the meantime, humans continue to benefit from the fact that reality obeys determined probabilities at the quantum scale. Such adequate determinism (see Varieties, above) is the reason that Stephen Hawking calls Libertarian free will "just an illusion".^[35] Compatibilistic free will (which is deterministic) may be the only kind of "free will" that can exist. However, Daniel Dennett, in his book Elbow Room, says that this means we have the only kind of free will "worth wanting". For even more discussion, see Free will.

Other matters of quantum determinism[link]

Chaotic radioactivity is the next explanatory challenge for physicists supporting determinism

All uranium found on earth is thought to have been synthesized during a supernova explosion that occurred roughly 5 billion years ago. Even before the laws of quantum mechanics were developed to their present level, the radioactivity of such elements has posed a challenge to determinism due to its unpredictability. One gram of uranium-238, a commonly occurring radioactive substance, contains some 2.5 x 10²¹ atoms. Each of these atoms are identical and indistinguishable according to all tests known to modern science. Yet about 12600 times a second, one of the atoms in that gram will decay, giving off an alpha particle. The challenge for determinism is to explain why and when decay occurs, since it does not seem to depend on external stimulus. Indeed, no extant theory of physics makes testable predictions of exactly when any given atom will decay. At best scientists can discover determined probabilities in the form of the element's half life.

The time dependent Schrödinger equation gives the first time derivative of the quantum state. That is, it explicitly and uniquely predicts the development of the wave function with time.

Failed to parse (Missing texvc executable; please see math/README to configure.): i\hbar\frac{\partial\psi(x,t)}{\partial t} = - \frac{\hbar^2}{2m} \frac{\partial^2\psi(x,t)}{\partial x^2}+V(x)\psi

So if the wave function itself is reality (rather than probability of classical coordinates), quantum mechanics can be said to be deterministic. Since we have no practical way of knowing the exact magnitudes, and especially the phases, in a full quantum mechanical description of the causes of an observable event, this turns out to be philosophically similar to the "hidden variable" doctrine^{[citation needed]}.

According to some,^{[citation needed]} quantum mechanics is more strongly ordered than Classical Mechanics, because while Classical Mechanics is chaotic (appears random, specifically due to minor details - perhaps at a smaller scale), quantum mechanics is not. For example, the classical problem of three bodies under a force such as gravity is not integrable, while the quantum mechanical three body problem is tractable and integrable, using the Faddeev Equations.^{[clarification needed]} This does not mean that quantum mechanics describes the world as more deterministic, unless one already considers the wave function to be the true reality. Even so, this does not get rid of the probabilities, because we can't do anything without using classical descriptions, but it assigns the probabilities to the classical approximation, rather than to the quantum reality.

Asserting that quantum mechanics is deterministic by treating the wave function itself as reality implies a single wave function for the entire universe, starting at the origin of the universe. Such a "wave function of everything" would carry the probabilities of not just the world we know, but every other possible world that could have evolved. For example, large voids in the distributions of galaxies are believed by many cosmologists to have originated in quantum fluctuations during the big bang. (See cosmic inflation and primordial fluctuations.) If so, the "wave function of everything" would carry the possibility that the region where our Milky Way galaxy is located could have been a void and the Earth never existed at all. (See large-scale structure of the cosmos.)

See also[link]

Notes[link]

References and bibliography[link]

• Daniel Dennett (2003) Freedom Evolves. Viking Penguin.
• John Earman (2007) "Aspects of Determinism in Modern Physics" in Butterfield, J., and Earman, J., eds., Philosophy of Physics, Part B. North Holland: 1369-1434.
• George Ellis (2005) "Physics and the Real World," Physics Today.
• Epstein J.M. (1999) "Agent Based Models and Generative Social Science," Complexity IV (5).
• -------- and Axtell R. (1996) Growing Artificial Societies — Social Science from the Bottom. MIT Press.
• Kenrick, D. T., Li, N. P., & Butner, J. (2003) "Dynamical evolutionary psychology: Individual decision rules and emergent social norms," Psychological Review 110: 3–28.
• Albert Messiah, Quantum Mechanics, English translation by G. M. Temmer of Mécanique Quantique, 1966, John Wiley and Sons, vol. I, chapter IV, section III.
• Nowak A., Vallacher R.R., Tesser A., Borkowski W., (2000) "Society of Self: The emergence of collective properties in self-structure," Psychological Review 107.
• Schimbera, Jürgen / Schimbera, Peter: Determination des Indeterminierten. Kritische Anmerkungen zur Determinismus- und Freiheitskontroverse. Verlag Dr. Kovac, Hamburg 2010, ISBN 978-3-8300-5099-5. 

External links[link]

• Stanford Encyclopedia of Philosophy entry on Causal Determinism
• Determinism in History from the Dictionary of the History of Ideas
• Philosopher Ted Honderich's Determinism web resource
• Determinism on Information Philosopher
• An Introduction to Free Will and Determinism by Paul Newall, aimed at beginners.
• The Society of Natural Science
• Determinism and Free Will in Judaism
• Snooker, Pool, and Determinism

Links to related articles v t e Determinism Types Biological · Cultural · Economic · Environmental · Genetic · Geographic · Historical · Linguistic · Psychological · Social · Technological · Theological Related topics Illusionism · Destiny · Deterministic system · Fatalism · Compatibilism and incompatibilism · Hard determinism · Indeterminism · Predeterminism · Necessitarianism · Uncertainty principle  · Libertarianism (metaphysics) v t e Philosophy Branches Metaphysics Epistemology Logic Ethics Aesthetics Philosophy of Action Art Being Biology Business Chemistry Computer science Culture Design Dialogue Education Economics Engineering Environment Film Futility Geography Information Healthcare History Human nature Humor Language Law Literature Mathematics Mind Music Pain Philosophy Physics Politics Psychology Religion Hermeneutics Science Sexuality Social science Technology War Schools of thought By historical era Ancient Western Medieval Renaissance Modern Contemporary Ancient Chinese Agriculturalism Confucianism Legalism Logicians Mohism Chinese naturalism Neotaoism Taoism Yangism Zen Greco-Roman Aristotelianism Cynicism Epicureanism Neoplatonism Peripatetic Platonism Presocratic Pythagoreanism Sophism Stoicism Indian Buddhist Cārvāka Hindu Jain Persian Mazdakism Zoroastrianism Zurvanism 9th–16th centuries Christian Europe Scholasticism Renaissance humanism Thomism East Asian Korean Confucianism Rigaku Neo-Confucianism Islamic Averroism Avicennism Persian Illuminationism Kalam Sufi Jewish Judeo-Islamic 17th–21st centuries Absolute idealism Analytic philosophy Anarchism Behaviorism Cartesianism Classical liberalism Deconstruction Dialectical materialism Eliminativism Epiphenomenalism Egoism Existentialism Feminist Frankfurt School Functionalism Hegelianism Kantianism Kokugaku Kyoto school Legal positivism Logical positivism Marxism Modernism Neo-Kantianism Neo-Thomism New Confucianism Ordinary language Phenomenology Postmodernism Post-structuralism Pragmatism Reformed epistemology Structuralism Transcendentalism Utilitarianism Vienna Circle more... Positions Certainty Skepticism Solipsism Nihilism Ethics Consequentialism Deontology Virtue Free will Compatibilism Determinism Libertarianism Metaphysics Atomism Dualism Monism Naturalism Epistemology Constructivism Empiricism Idealism Particularism Rationalism Naturalism Normativity Absolutism Particularism Relativism Universalism Ontology Action Event Process Reality Anti-realism Conceptualism Idealism Materialism Nominalism Realism By region African American Aztec British Chinese Danish French German Greek Indian Indonesian Iranian Italian Japanese Korean Polish Romanian Russian Lists Outline Index Schools Glossary Philosophers Movements Publications Portal Category WikiProject changes v t e Theological thought Abrahamism · Acosmism · Agnosticism · Animism · Antireligion · Atheism · Deism · Dharmism · Discordianism - Dualism · Esotericism · Feminist theology · Gnosticism · Henotheism · Immanence · Monism · Monotheism · Mysticism · New Age · New Thought · Nondualism · Pandeism · Pantheism · Polytheism · Process theology · Rastafari movement - Religious naturalism · Shamanism · Shramanism · Taoic · Theism · Thelema - Transcendence · more Religion portal v t e Philosophy of time Concepts in time Time · Duration · A priori and a posteriori · Eternity · Event  · Action · Deterministic system · Free will · Eternal return · A-series and B-series · Temporal parts · Growing block universe Time Portal Theories of time Determinism · Temporal finitism · Fatalism · Indeterminism · Compatibilism and incompatibilism · Presentism · Eternalism · Four dimensionalism · Endurantism · Perdurantism  · B-Theory of time Related articles Metaphysics · Etiology · Teleology · Post hoc ergo propter hoc · The Unreality of Time v t e Metaphysics Metaphysicians Parmenides Plato Aristotle Maimonides Kapila Plotinus Duns Scotus Thomas Aquinas René Descartes John Locke David Hume Immanuel Kant Isaac Newton Arthur Schopenhauer Baruch Spinoza Georg W. F. Hegel George Berkeley Gottfried Wilhelm Leibniz Henri Bergson Friedrich Nietzsche Charles Sanders Peirce Ludwig Wittgenstein Martin Heidegger Alfred N. Whitehead Bertrand Russell Dorothy Emmet G. E. Moore Jean-Paul Sartre Gilbert Ryle Hilary Putnam P. F. Strawson R. G. Collingwood Adolph Stöhr Rudolf Carnap Saul Kripke Willard V. O. Quine Donald Davidson more ... Theories Anti-realism Cartesian dualism Enactivism Free will Liberty Materialism Meaning of life Idealism Existentialism Essentialism Libertarianism Determinism Naturalism Monism Platonic idealism Hindu idealism Phenomenalism Nihilism Realism Physicalism MOQ Relativism Scientific realism Solipsism Subjectivism Substance theory Type theory Sankhya Concepts Action Abstract object Being Category of being Causality Change Choice Concept Cogito ergo sum Embodied cognition Entity Essence Existence Experience Form Idea Identity Information Insight Intelligence Intention Matter Memetics Mind Meaning Mental representation Modality Motion Necessity Notion Object Pattern Physical object Perception Principle Properties Qualia Quality Reality Subject Soul Substance Thought Time Truth Type Universal Unobservable Value World soul more ... Related articles Cosmology Epistemology Ontology Teleology Philosophy of psychology Philosophy of mind Philosophy of self Philosophy of space and time Axiology Theoretical physics meta- Portal Category Task Force Stubs Discussion v t e Epistemology Epistemologists Thomas Aquinas Robert Audi A. J. Ayer George Berkeley Laurence BonJour René Descartes Edmund Gettier Alvin Goldman Nelson Goodman Paul Grice David Hume Immanuel Kant Søren Kierkegaard John Locke G. E. Moore Robert Nozick Alvin Plantinga Plato P. F. Strawson W.V.O. Quine Bertrand Russell Ludwig Wittgenstein Vienna Circle Theories Coherentism Constructivist epistemology Contextualism Determinism Empiricism Fallibilism Foundationalism Holism Infinitism Innatism Internalism and externalism Naïve realism Naturalized epistemology Phenomenalism Positivism Reductionism Reliabilism Representative realism Rationalism Skepticism Theory of Forms Transcendental idealism Uniformitarianism Concepts A priori knowledge Analysis Analytic-synthetic distinction Belief Causality Common sense Descriptive knowledge Exploratory thought Gettier problem Justification Knowledge Induction Objectivity Problem of induction Other minds Perception Proposition Regress argument Simplicity Speculative reason Truth more... Related articles Outline of epistemology Alethiology Faith and rationality Formal epistemology Meta-epistemology Philosophy of perception Philosophy of science Social epistemology Portal Category Task Force Stubs Discussion v t e Philosophy of science Philosophers Albert Einstein Alfred North Whitehead Aristotle Auguste Comte Averroes Berlin Circle Carl Gustav Hempel C. D. Broad Charles Sanders Peirce Dominicus Gundissalinus Daniel Dennett Epicurians Francis Bacon Friedrich Schelling Galileo Galilei Henri Poincaré Herbert Spencer Hugh of Saint Victor Immanuel Kant Imre Lakatos Isaac Newton John Dewey John Stuart Mill Jürgen Habermas Karl Pearson Karl Popper Karl Theodor Jaspers Larry Laudan Otto Neurath Paul Häberlin Paul Feyerabend Pierre Duhem Pierre Gassendi Plato R.B. Braithwaite René Descartes Robert Kilwardby Roger Bacon Rudolf Carnap Stephen Toulmin Stoicism Thomas Hobbes Thomas Samuel Kuhn Vienna Circle W.V.O. Quine Wilhelm Windelband Wilhelm Wundt William of Ockham William Whewell more... Concepts Analysis Analytic-synthetic distinction A priori and a posteriori Artificial intelligence Causality Commensurability Construct Demarcation problem Explanatory power Fact Falsifiability Ignoramus et ignorabimus Inductive reasoning Ingenuity Inquiry Models of scientific inquiry Nature Objectivity Observation Paradigm Problem of induction Scientific explanation Scientific law Scientific method Scientific revolution Scientific theory Testability Theory choice Metatheory of science Confirmation holism Coherentism Contextualism Conventionalism Deductive-nomological model Determinism Empiricism Fallibilism Foundationalism Hypothetico-deductive model Infinitism Instrumentalism Naturalism Positivism Pragmatism Rationalism Received view of theories Reductionism Semantic view of theories Scientific realism Scientism Scientific anti-realism Skepticism Uniformitarianism Vitalism Metaphysics Related Epistemology History and philosophy of science History of science History of evolutionary thought Philosophy of biology Philosophy of chemistry Philosophy of physics Philosophy of mind Philosophy of artificial intelligence Philosophy of information Philosophy of perception Philosophy of space and time Philosophy of thermal and statistical physics Philosophy of social science Philosophy of environment Philosophy of psychology Philosophy of technology Philosophy of computer science Pseudoscience Relationship between religion and science Rhetoric of science Sociology of scientific knowledge Criticism of science Alchemy more... Portal Category Task Force Discussion Changes