who is the oldest known philosopher
ï»¿ï»¿ï»¿Thales of Miletus. Thales of Miletus (c. 624 BCE â c. 546 BCE) was an ancient (pre-Soctratic) Greek philosopher who is often considered the first philosopher and the father of Western philosophy.ersonal Life. Not much is known about the philosopherâs early life, not even his exact dates of birth and death. He is believed to be born in the city of Miletus, an ancient Greek Ionian city on the western coast of Asia Minor in todayâs Turkey.