Ancient Greek philosophy arose in the 6th century BC and lasted through the Hellenistic period (323 BC-30 BC). Greek philosophy covers an absolutely enormous amount of topics including: political philosophy, ethics, metaphysics, ontology (the study of the nature of being, becoming, existence, or reality), logic, biology, rhetoric, and aesthetics (branch of philosophy dealing with art, beauty, and taste).
Greek philosophy is known for its undeniable influence on Western thought. Although there were Greek philosophers before their respective births, Socrates, Plato, and Aristotle are the only three worth focusing on during this period.
Socrates, Plato, and Aristotle (Short Documentary)