According to Anaximander, humans in the beginning resembled fish.

According to Anaximander, humans in the beginning resembled fish. In the second half of the the fifth century, the materialism of the sixth century was adopted and extended by the atomist Leucippus of Miletus (fl. 440 B.C.E.) and Democrutus of Abdera (c. 470 – c. 400 B.C.). Democritus constructed a complex explanation of all phenomena in purely materialistic terms: The world was composed exclusively of uncaused and immutable material atoms.

These invisibly minute and indivisible particles perpetually moved about in a boundless void and by their random collisions and varying combinations produced the phenomena of the visible world. In the words of Democritus, “nothing exists except atoms…