Leucippus

• The Greeks regarded Leucippus as the creator of atomism
  
• Little is known about the life of Leucippus, his views are hard to distinguish from Plato
• Credited with the theory that the universe consists of two different elements, the solid and the empty. The atoms within these elements were thought to be infinite, with the elements of everything in between these elements.
• Believed that 'what is' must be unified and unchanging, because any difference or change within 'what is' involves claim of 'what is not,' an incoherent view.
• Leucippus thought that atoms are always in motion