10. About Leucippus

But Leucippus, a companion of Zeno, did not keep to the same opinion (as Parmenides), but says that all things are boundless and ever-moving and that birth and change are unceasing. And he says that fulness and the void are elements. And he says also that the ordered worlds came into being thus: when many bodies were crowded together and flowed from the ambient into a great void, on coming into contact with one another, those of like fashion and similar form coalesced, and from their intertwining yet others were generated and increased and diminished by a certain necessity. But what that necessity may be he did not define.