Atomicity in Physical Nature-From the earliest times men have been curious about the makeup of material things and the mechanism of visible processes. When Empedocles reasoned that all change is merely a rearrangement of permanent, unchangeable parts - an idea which the YAtomists and Anaxagoras later elaborated in greater detail - he merely gave expression to what seems to be an intuitive conviction about Nature in general. Anaxagoras recognized the existence of atoms and the fact that there are different kinds of atoms; and he furthermore introduced the grotesque idea of atoms endowed with intelligence, by way of accounting for the order existing in Nature
