- A Treatise Concerning the Principles of Human Knowledge
- Abstract and concrete
- Abstract object theory
- Action theory (philosophy)
- Actual idealism
- Agency (philosophy)
- Agent causation
- Alexius Meinong
- Alfred North Whitehead
- Alvin Plantinga
- Anima mundi
- Anti-realism
- Aristotle
- Arthur Schopenhauer
- Axiology
- Baruch Spinoza
- Bayesian inference
- Being and Nothingness
- Being and Time
- Benjamin Libet
- Bernard Bolzano
- Bertrand Russell
- Bibcode (identifier)
- Biological determinism
- Category of being
- Causal closure
- Causality
- Cause (medicine)
- Charles Sanders Peirce
- Christian Wolff (philosopher)
- Clinamen
- Cogito, ergo sum
- Compatibilism
- Concept
- Concluding Unscientific Postscript to Philosophical Fragments
- Contingency (philosophy)
- Correlation does not imply causation
- Cosmology
- Critique of Pure Reason
- Cultural determinism
- Daneshnameh-ye Alai
- Daniel Dennett
- David Hume
- David Lewis (philosopher)
- David Malet Armstrong
- De rerum natura
- Derek Parfit
- Destiny
- Determinism
- Determinist
- Deterministic system (philosophy)
- Doi (identifier)
- Domingo Báñez
- Donald Davidson (philosopher)
- Duns Scotus
- Early modern period
- Economic determinism
- Embodied cognition
- Enactivism
- Enneads
- Environmental determinism
- Epicureanism
- Epicurus
- Epistemology
- Essence
- Essentialism
- Ethics (Spinoza book)
- Etiology
- Existence
- Existentialism
- Experience
- Falliblism
- Fatalism
- Feminist metaphysics
- Francisco Suárez
- Free will
- Free will in antiquity
- Free will theorem
- Freedom Evolves
- Friedrich Nietzsche
- G. E. M. Anscombe
- G. E. Moore
- Galen Strawson
- Genetic determinism
- Georg Wilhelm Friedrich Hegel
- George Berkeley
- Gilbert Ryle
- Gilles Deleuze
- Gottfried Wilhelm Leibniz
- Hard determinism
- Hellenistic philosophy
- Henri Bergson
- Hermann Lotze
- Hilary Putnam
- Historical determinism
- Hypostatic abstraction
- ISBN (identifier)
- ISSN (identifier)
- Idea
- Idealism
- Identity (philosophy)
- Illusionism (philosophy)
- Ilya Prigogine
- Immanuel Kant
- Incompatibilism
- Incompatibilist
- Indeterminism
- Index of metaphysics articles
- Information
- Insight
- Intelligence
- Intention
- Interactionism (philosophy of mind)
- Interpretations of quantum mechanics
- Isaac Newton
- Jean-Paul Sartre
- John Duns Scotus
- John Locke
- John Martin Fischer
- John von Neumann
- Libertarianism (disambiguation)
- Liberty
- Linguistic determinism
- Linguistic modality
- List of metaphysicians
- Lucretius
- Ludwig Wittgenstein
- Luis de Molina
- Many-worlds interpretation
- Martin Heidegger
- Materialism
- Matter (philosophy)
- Meaning (existential)
- Meaning of life
- Meditations on First Philosophy
- Mental representation
- Mereology
- Meta
- Metaphysical necessity
- Metaphysics
- Metaphysics (Aristotle)
- Michael Dummett
- Mind
- Mind–body dualism
- Miracles (book)
- Molinism
- Monadology
- Monism
- Motion
- Naturalism (philosophy)
- Nature (philosophy)
- Necessitarianism
- Neuroscience of free will
- Newcomb's paradox
- Nicolas Malebranche
- Niels Bohr
- Nihilism
- Non-essentialism
- Non-reductive physicalism
- Nyāya Sūtras
- Object (philosophy)
- Ontology
- P. F. Strawson
- Panpsychism
- Parmenides
- Pattern
- Perception
- Peter van Inwagen
- Phenomenalism
- Phenomenology (philosophy)
- Philosophical Explanations
- Philosophical realism
- Philosophical zombie
- Philosophy
- Philosophy of mind
- Philosophy of psychology
- Philosophy of self
- Philosophy of space and time
- Physical object
- Physicalism
- Plato
- Plotinus
- Predeterminism
- Principle
- Problem of induction
- Proclus
- Prolegomena to Any Future Metaphysics
- Property (philosophy)
- Proximate and ultimate causation
- Psychological determinism
- Qualia
- Quality (philosophy)
- Quantum indeterminacy
- Quantum mechanics
- R. G. Collingwood
- Randolph Clarke (philosopher)
- Reality
- Relations (philosophy)
- Relativism
- René Descartes
- Robert Kane (philosopher)
- Robert Nozick
- Roderick Chisholm
- Rudolf Carnap
- S2CID (identifier)
- Saul Kripke
- Scientific realism
- Shaun Nichols
- Simulacra and Simulation
- Social determinism
- Solipsism
- Sophist (dialogue)
- Soul
- Stochastic
- Subject (philosophy)
- Subjectivism
- Substance theory
- Substantial form
- Superdeterminism
- Technological determinism
- Ted Honderich
- Teleology
- Tertium quid
- The Phenomenology of Spirit
- The Philosophy of Freedom
- The World as Will and Representation
- Theological determinism
- Theory of forms
- Thomas Aquinas
- Thomas Reid
- Thomism
- Thought
- Timaeus (dialogue)
- Time
- Truth
- Truthmaker theory
- Type theory
- Type–token distinction
- Uncertainty principle
- Universal (metaphysics)
- Unmoved mover
- Unobservable
- Value (ethics)
- Volition (psychology)
- Voluntarism (philosophy)
- Wayback Machine
- Willard Van Orman Quine
- William Belsham
- William James