Democritus believed in atomism, proposing that all matter is composed of indivisible atoms.
Democritus, one of the early Greek philosophers, is associated with the belief in atomism in the area of Metaphysics. He proposed that all matter in the universe is made up of tiny, indivisible, solid objects called "atomos." This concept of atoms being the fundamental building blocks of all matter was a significant contribution to early philosophical thought.
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