+Thales of Miletus was a pre-Socratic Greek philosopher, mathematician, and astronomer. Often regarded as the first philosopher, he proposed that [Water](/wiki/water) was the fundamental substance of the world and made early contributions to [Geometry](/wiki/geometry).
+## See also
+- [Philosophy](/wiki/philosophy)
+- [Miletus](/wiki/miletus)
+- [Pre-Socratics](/wiki/pre-socratics)