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Principles of Philosophy was written by René Descartes and published in 1644. Descartes intended it to be his magnum opus—the synthesis of all his theories in physics and philosophy divided into four Parts. Part I is the only part of Principles of Philosophy that we, today, would call “philosophy.” It is an account of Descartes' epistemology and his metaphysics. The rest of the work deals with Descartes’s natural philosophy, or what we would call “science.”
Read the detailed section-by-section Summary & Analysis or the Full Work Summary of Principles of Philosophy.
Reference this list of key terms to consult as you study Principles of Philosophy.
Read descriptions of the main underlying ideas in Principles of Philosophy.
Explore our selection of frequently asked questions about Principles of Philosophy and find the answers you need.
Find the quotes you need to support your essay, or refresh your memory of Principles of Philosophy.
Go deeper into Principles of Philosophy by reading background information about René Descartes and the historical and philosophical context on his work.
Test your knowledge of Principles of Philosophy with these quiz questions.
