Republic of Greece, 10 Drachmai 1976

Democritus (c. 460-370 BC) is regarded as the last exponent of natural philosophy. That was the attempt to conceive nature as a whole. Democritus and his teacher Leucippus were the "inventors" of the atomic theory, for they claimed that everything is composed of tiny undividable elements, the atoms. Classical Greek philosophy was based on natural philosophy.