Question: W;hat ancient Greek philosopher died in 322 BC had testimony used in "On The Nature of Man"?
Sentence (from "Xenophon"): Xenophon of Athens ( ; Greek: Ξενοφῶν , "Xenophōn"; c. 430–354 BC) was an ancient Greek philosopher, historian, soldier, mercenary, and student of Socrates'.
Relevant evidence: No