P
- Pacifism
- Paley, William
- Panpsychism
- Paraconsistent Logic
- Paradox of Fiction
- Paradox, Liar
- Paradox, Russell’s
- Paradox, Russell-Myhill
- Paradoxes, Logical
- Paradoxes, Zeno’s
- Parmenides
- Pascal’s Wager about God
- Pascal, Jacqueline
- Peirce, Charles Sanders
- Perception, Epistemology of
- Perception, Objects of
- Peripatetics
- Personal Identity
- Personalism
- Phenomenology
- Philo of Alexandria
- Philosophy: What Philosophy Is—Contemporary Perspectives
- Philosophy of History
- Philosophy of Language
- Philosophy of Law
- Philosophy of Love
- Philosophy of Sexuality
- Philosophy of War
- Physicalism, The Knowledge Argument Against
- Plato
- Platonism and Theism
- Platonism, Mathematical
- Plotinus
- Poincaré, Jules Henri
- Poincaré’s Philosophy of Mathematics
- Political Obligation
- Political Philosophy
- Political Philosophy of Alasdair MacIntyre
- Political Realism
- Politics, Religion and
- Polyhistor, Alexander
- Popper and Critical Rationalism
- Positivism, Legal
- Practical Reason, Medieval Theories of
- Pragmatism
- Praise and Blame
- Predicative and Impredicative Definitions
- Priestley, Joseph
- Private Property, Right to
- Process Philosophy
- Prodicus
- Proof-Theoretic Conceptions of Logical Consequence
- Property Concepts
- Propositional Logic
- Prosentential Theory of Truth
- Protagoras
- Pseudo-Dionysius the Areopagite
- Psychological Egoism
- Pudgalavāda Buddhist Philosophy
- Punishment
- Pyrrho
- Pythagoras