Diogenes of Sinope · Aristotle Were Diogenes of Sinope and Aristotle alive at the same time? Yes. Diogenes of Sinope and Aristotle were alive at the same time, from 384 BC to 322 BC. Diogenes of Sinope4th-century BC Greek Cynic philosopherBorn c. 400 BC · died c. 323 BCAristotleGreek philosopherBorn 384 BC · died 322 BC, aged 61 or 62 HippocratesAristophanesDiogenes of SinopeAristotleChanakyaAlexander the GreatEpicurus Diogenes of Sinope and Aristotle in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.