Written in the third century AD, The Lives and Opinions of Eminent Philosophers by Diogenes Laertius is one of the most important sources we have for the biographies, anecdotes, and teachings of ancient Greek philosophers — from Thales and Pythagoras through Plato, Aristotle, the Stoics, and the Epicureans. For many philosophical schools, Diogenes is our primary or only source.
Although his method is sometimes uncritical, his collection of sayings, arguments, and biographical details is an irreplaceable window into ancient Greek intellectual life. Download this free EPUB from Better Gutenberg for an essential reference in the history of philosophy.