Diogenes of Sinope
Diogenes of Sinope (in short, Diogenes) was an Ancient Greek philosopher. His birthplace is Sinope (in modern-day Sinop, Turkey). He was born about 412 BC. Some people say he was born about 399 BC. He died in 323 BC at Corinth. There is a book by Diogenes Laërtius. The book tells us that Diogenes of Sinope died on the same day on which Alexander the Great died at Babylon. He was a founder of the philosophy called cynicism. He is also considered to be the first to use the word "cosmopolitan".