Early Greek | Philosophy

Based in Miletus, these thinkers searched for the arche —the single primary substance that makes up the universe.

Heraclitus believed the universe was in a state of constant flux. Early Greek philosophy

: Argued the source couldn't be a specific element like water; instead, it was the apeiron —an "unlimited" or "indefinite" substance. 2. Heraclitus : The Philosophy of Change Based in Miletus, these thinkers searched for the

Here is a look at three major "pieces" or schools of thought that laid the groundwork for Western science and logic: 1. The Milesians: Finding the First Substance Based in Miletus