The inner logic of the Atomist theory, therefore, led straight to the conclusion that consciousness and perception, as they are known in ordinary experiences, are epiphenomena, determined and accounted for completely by the states and rearrangements of components not themselves capable of consciousness or perception… It followed that the whole history of the universe was determined, if at all, by a ‘meaningless’ necessity inherent in the laws governing the collision and rebound of atoms, a force which was devoid of any inherent tendency to the better, or of any regard for the wishes and requirements of such accidental by-products as conscious beings.

Edward Hussey, ‘The Presocratics’ (p.148)