This document provides an overview of the history of philosophy from ancient to modern times. It discusses major philosophical eras, thinkers, and ideas. Some of the key topics covered include Greek and Roman philosophy, medieval scholasticism, the scientific revolution with figures like Copernicus, Galileo and Bacon, and modern philosophical movements such as rationalism, empiricism, idealism, and existentialism. Major philosophers from each era like Descartes, Locke, Kant, and Sartre are also mentioned.