Sotion of Alexandria (fl. c. 200 BC – 170 BC) was a Greek doxographer and biographer, and an important source for Diogenes Laërtius. None of his works survive; they are known only indirectly. His principal work, the Διαδοχή or Διαδοχαί (the Successions), was one of the first history books to have organized philosophers into schools of successive influence: e.g., the so-called Ionian School of Thales, Anaximander and Anaximenes. It is quoted very frequently by Diogenes Laërtius,[1] and Athenaeus.[2] Sotion's Successions likely consisted of 23 books,[3] and at least partly drew on the doxography of Theophrastus. The Successions was influential enough to be abridged by Heraclides Lembus in the mid-2nd century BC, and works by the same title were subsequently written by Sosicrates of Rhodes and Antisthenes of Rhodes.
He was also, apparently, the author of a work, On Timon's Silloi,[4] and of a work entitled Refutations of Diocles.[5]