Socrates was a Greek philosopher from Athens who is credited as a founder of Western philosophy and the first moral philosopher of the ethical tradition of thought.
Socrates of Athens
Diogenes, also known as Diogenes the Cynic, was a Greek philosopher and one of the founders of Cynic philosophy. He was born in Sinope, an Ionian colony on the Black Sea coast of Anatolia in 412 or 404 BC and died at Corinth in 323 BC. Diogenes was a controversial figure.
Diogenes the Cynic
Friedrich Wilhelm Nietzsche was a German philosopher, cultural critic, composer, poet, writer, and philologist whose work has exerted a profound influence on modern intellectual history. He began his career as a classical philologist before turning to philosophy.
Friedrich Nietzsche
Zeno of Citium was a Hellenistic philosopher from Citium, Cyprus. Zeno was the founder of the Stoic school of philosophy, which he taught in Athens from about 300 BC
Zeno of Citium
