Diogenes Laërtius, the biographer of the Greek philosophers, is supposed by some to have received his surname from the town of Laerte in Cilicia, and by others from the Roman family of the Laërtii.
Of the circumstances of his life we know nothing. He must have lived after Sextus Empiricus (c. 200), whom he mentions, and before Stephanus of Byzantium (c. 500), who quotes him. It is probable that he flourished during the reign of Alexander Severus (222–235) and his successors.
His own opinions are equally uncertain. By some he was regarded as a Christian; but it seems more probable that he was an Epicurean. The work by which he is known, Lives and Opinions of Eminent Philosophers, was written in Greek and professes to give an account of the lives and sayings of the Greek philosophers. Although it is at best an uncritical and unphilosophical compilation, its value, as giving us an insight into the private life of the Greek sages, justly led Montaigne to exclaim that he wished that instead of one Laërtius there had been a dozen.
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Classical Studies :: Arts
History of Philosophy :: Philosophy
Ancient :: History of Philosophy

Internet Encyclopedia of Philosophy: Diogenes Laertius - Concise article on this ancient biographer.
Lives of the Philosophers - Online text of C.D. Yonge's translation.
Notes on Diogenes Laertius - A criticism of this author's reliability, based on his Life of Socrates.
The Lives and Opinions of Eminent Philosphers - Hicks' notes from his 1925 translation of this text.
Wikipedia: Diogenes Laertius - Article drawing on the 1911 Britannica.
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