This volume is a revised translation of the complete text of Book Six about Diogenes of Sinope and the Cynics, taken from The Lives and Opinions of Eminent Philosophers written around AD 230 by the Graeco-Roman author Diogenes Laertius. The Life of Diogenes is accompanied by a detailed outline of Cynic philosophy, explaining Cynic doctrine and its significance for today's audience. Alongside the Life of Diogenes are accounts of other Cynics, including Antisthenes, Crates and Hipparchia. The works of the early Cynics have all been lost, and this text by Diogenes Laertius thankfully preserves an important range of quotations and references. Despite the Cynic's extreme stance, this idealistic philosophy still has a valid part to play in the face of the increasing materialism of our modern society, challenging us to re-evaluate our priorities. The nineteenth-century translation of C. D. Yonge has been substantially revised, and is supported by a new Introduction, Glossary of Names, Notes and Index.