Anaxagoras of Clazomenae, born about 500 BC, is the first person who is definitely known to have explained the concept of a nous (mind), which arranged all other things in the cosmos in their proper order, started them in a rotating motion, and continuing to control them to some extent, having an especially strong connection with living things. (However Aristotle reports an earlier philosopher from Clezomenae named Hermotimus who had taken a similar position.[8]) Amongst Pre-Socratic philosophers before Anaxagoras, other philosophers had proposed a similar ordering human-like principle causing life and the rotation of the heavens. For example, Empedocles, like Hesiod much earlier, described cosmic order and living things as caused by a cosmic version of love,[9] and Pythagoras and Heraclitus, attributed the cosmos with "reason" (logos).[10]