Antisthenes
From Conservapedia
Antisthenes (445-365 B.C.) was a Greek philosopher and was the teacher of Diogenes, who founded (perhaps with Antisthenes) the philosophy of the Cynics.
Antisthenes (445-365 B.C.) was a Greek philosopher and was the teacher of Diogenes, who founded (perhaps with Antisthenes) the philosophy of the Cynics.