Britannica Sources used in this answer

How did Thomas Hobbes combine empiricism with rationalism?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Painting by Joseph Aubert of Saint Thomas Aquinas seated with a book, wearing a halo and black and white robes, surrounded by ornate patterns in St. Stephens Church, Jerusalem. — Western philosophy Painting of scholastic philosopher St. Thomas of Aquinas by Joseph Aubert, 1900.

Thomas Hobbes integrated empiricism and rationalism by grounding his systematic philosophy in both sensory experience and rigorous deductive reasoning.

His empiricism was rooted in the belief that all knowledge originates from sense experiences, which he argued are caused by the actions of physical bodies on human sense organs. This sensationalist foundation led him to adopt nominalism, rejecting the existence of abstract universals in favor of a world composed entirely of matter in motion.12

He combined this with a rationalist methodology heavily influenced by geometry and the deductive proofs of Euclid. For Hobbes, philosophy was essentially a process of reasoning or calculating the causes and effects of phenomena. He favored synthetic reasoning—moving deductively from causes to effects—to construct a comprehensive, systematic description of nature, psychology, and civil society. By applying these mechanical, materialist principles to human behavior, he sought to explain complex social and political structures through the same logical framework used in the natural sciences.312