Anaxagoras
Anaxagoras (Greek: Ἀναξαγόρας) of Clazomenae (ca. 500-428 BCE) regarded material substance as an infinite multitude of imperishable primary elements, referring all generation and disappearance to mixture and separation respectively. All substance is ordered by an ordering force, the cosmic mind (nous).
Read more about this topic: Ionian School (philosophy)