Branches
The major divisions of inquiry, from metaphysics and epistemology to logic, ethics, and aesthetics.
A reference for reading philosophy carefully.
PhilWiki collects entries on the branches, figures, and arguments of philosophy, each written for clarity, organized for study, and supported by cited sources. Entries are structured so a reader can move from a working definition to the surrounding debate without losing the thread.
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Thinkers
Figures across periods and traditions, with their central claims, context, and the texts that carry them.
Concepts
Arguments, distinctions, and terms of art, each defined and placed within its live debate.
Applied & AI Ethics
Philosophy meeting practice: bioethics, political philosophy, and the ethics of machine intelligence.
Study Guides
Reading paths and primers that sequence entries for coursework and independent study.
From the collection
Featured entries
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01
Concepts · Metaphysics
Free Will and Determinism
Whether human choices can be free if every event has a prior cause, with the hard-determinist, libertarian, and compatibilist replies.
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02
Concepts · Epistemology
The Gettier Problem
Edmund Gettier’s short paper showing that justified true belief is not sufficient for knowledge, and the responses it provoked.
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03
Concepts · Ethics
The Trolley Problem
A family of thought experiments on whether it is permissible to harm one person to save several, and what the cases reveal about moral theory.
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04
Concepts · Meta-ethics
Reflective Equilibrium
The method of adjusting principles and considered judgments against one another until they cohere, central to Rawlsian moral epistemology.
Editorial note
Entries are drafted and maintained by the PhilWiki editorial team and reviewed against primary and secondary literature before publication. Drafting and copy-editing are assisted by AI tools under human editorial review; every published entry is checked and approved by a member of the team.
Where an entry summarizes a contested view, it names the positions rather than settling them. Citations link to primary texts and established scholarly references wherever they exist. Read more on the editorial standards page.