P
- Pacifism
- Paley, William
- Panpsychism
- Paraconsistent Logic
- Paradigm Case Arguments
- Paradox
- Parmenides
- Particularism, Moral
- Pascal, Blaise
- Pascal, Jacqueline
- Peace, Philosophy of
- Peirce, Charles Sanders
- Pejorative Language
- Perception, Epistemology of
- Perception, Objects of
- Peripatetics
- Personal Identity
- Personalism
- Phenomenal Conservatism
- Phenomenology
- Philo of Alexandria
- Philodemus of Gadara
- Philosophy: What Philosophy Is—Contemporary Perspectives
- Philosophy of Anthropology
- Philosophy of Film
- Philosophy of History
- Philosophy of Language
- Philosophy of Law
- Philosophy of Love
- Philosophy of Music
- Philosophy of Religion
- Philosophy of Sexuality
- Philosophy of War
- Physicalism, The Knowledge Argument Against
- Plato
- Platonism and Theism
- Platonism, Mathematical
- Plotinus
- Plotinus: Virtue Ethics
- Poincaré, Jules Henri
- Political Philosophy
- Polyhistor, Alexander
- Popper, Karl
- Port Royal Logic
- Positivism, Legal
- Practical Reason, Medieval Theories of
- Pragmatism
- Praise and Blame
- Precautionary Principles
- Presocratics
- Predicative and Impredicative Definitions
- Priestley, Joseph
- Prior, Arthur: Logic
- Problem of the Criterion
- Process Philosophy
- Prodicus
- Proof-Theoretic Conceptions of Logical Consequence
- Proper Functionalism
- Properties
- Property
- Propositional Logic
- Prosentential Theory of Truth
- Protagoras
- Pseudo-Dionysius the Areopagite
- Psychological Egoism
- Psychology, Evolutionary
- Pudgalavāda Buddhist Philosophy
- Punishment
- Punishment, The Moral Permissibility of
- Pyrrho
- Pythagoras
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