Diogenes the Cynic (, dy-OJ-in-eez; c. 413/403–c. 324/321 BC), also known as Diogenes of Sinope, was an ancient Greek philosopher and one of the founders of Cynicism. Renowned for his ascetic lifestyle, biting wit, and radical critiques of social conventions, he became a legendary figure whose life and teachings have been recounted, often through anecdote, in both antiquity and later cultural traditions.
https://en.wikipedia.org/wiki/Diogenes