Enlarged to provide nearly a hundred pages of additional material, this new edition offers the first English translation of the account of Stoic ethics by Arius Didysmus, substantial new sources on Epicureanism, Stoicism, and Scepticism, expanded representation of Plutarch and Cicero, and a fuller representation of papyrological evidence. The editors maintain the consistency and accuracy that distinguished their translations in the first edition, while regrouping some material into larger, more thematically connected passages. This edition is further enhanced by a new more spacious page design.