Socrates
- 470-399 B.C,- NEVER wrote anything
 - Gave philosophy its preeminent method- Socratic method or questioning (form of inquiry and debate between individuals with opposing viewpoints based on asking and answering questions to stimulate rational thinking and to illuminate ideas)
 - Believed knowledge does not come from memorizing facts & repeating them
 - True wisdom comes from being able to answer why?
 
Plato
- Pupil of Socrates (427 -347 B.C.)
 - Founded the 1st multi-subject, multi-teacher institution of higher learning in Western Civilization
 - Wrote a number of dialogues, most famous of which is the Republic
 - Platonic metaphysics formed model for Christianity for around 15 centuries
 
Aristotle
- Taught by Plato (384-322 B.C.)
 - Coined term metaphysics, which translates to “after the things of nature”
 - Wrote about numerous subjects including metaphysics, biology, poetry, physics
 - Believed in the importance of direct observation of nature & having factual data before theorizing
 - In 13th century A.D., his metaphysics came to dominate Christian theology