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624 BCE
Thales of Miletus
All of Nature had developed from one source (624–620 BCE). -
570 BCE
Pythagoras
Pythagoras (570 BCE - 490 BCE) prescribed a highly structured way of life and espoused the doctrine of metempsychosis (transmigration of the soul after death into a new body, human or animal. -
540 BCE
Heraclitus
Heraclitus (540 bce - 480 bce)
\The world exists as a coherent system in which a change in one direction is ultimately balanced by a corresponding change in another. -
484 BCE
Aristotle
there must be a separate and unchanging being that is the source of all other beings -
470 BCE
Socrates
Socrates (470 - 399 BCE) no one does wrong voluntarily. Evil is the result of ignorance. If people knew what was the right thing to do they would do it. We always choose what we think is the best or good for us. -
429 BCE
Plato
Plato - (429 - 348BC)
- Good action give strength to ourselves and inspire good action in others -
412 BCE
Diogenes
Diogenes (412 BC - 323 BC Though Diogenes himself lived in poverty, slept in public buildings, and begged his food, he did not insist that all men should live in the same way but merely intended to show that happiness and independence were possible even under reduced circumstances.