Leucippus
Proper noun
Meaning
(philosophy) an Ancient Greek philosopher from Miletus, the founder of atomism and the first thinker in western history to consider determinism as a possibility, disciple of Zeno of Elea
a son of Hercules
Source: en.wiktionary.orgExamples
According to Aristotle Leucippus differed from the Eleatics in not being encumbered by the "conceptual intermingling" of being and non-being, and Plato made the necessary distinction between "grades of being and types of negation".
Atomist school The first explicitly materialistic system was formed by Leucippus (5th century BCE) and his pupil Democritus of Abdera (460-370 BCE) from Thrace.
Diogenes Laërtius says "Leucippus was born at Elea, but some say at Abdera and others at Miletus," Diogenes Laërtius 9.30.
Most sources say that Democritus followed in the tradition of Leucippus and that they carried on the scientific rationalist philosophy associated with Miletus.
Leucippus claimed there were no uncaused events, and that everything occurs for a reason and by necessity.
Leucippus contended that since movement exists, there must be empty space.