Of Democritus' and Epicurus' followers

philosopher Lucretius (c. 99 - 55 B.C.) whose "On the Nature of Things" was one of the definitive works of Epicureanism, but also of Atomism. It argues that the universe and all substance is eternal, composed of atoms moving in an infinite void and nothing else, and that the human soul also consists of minute atoms that dissipate into smoke when a person dies.