The Republic
Plato
The Republic - A book resource
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More resources on Philosophy
Meditations
Meditations - A book resource
History of Philosophy
Coursera course: Introduction to Philosophy
plato.stanford.edu
The Stanford Encyclopedia of Philosophy (plato.stanford.edu) is a free, peer‑reviewed online encyclopedia offering in‑depth scholarly essays on philosophy, written by experts and updated regularly. It provides comprehensive articles on philosophers, concepts, problems, and contemporary debates, with extensive bibliographies and cross‑references.
philosophy.org
Philosophy.org is a comprehensive online learning hub for philosophy. It provides beginner-friendly explanations, articles on core topics (ethics, metaphysics, epistemology, logic), profiles of key philosophers, and glossaries with reading recommendations.