Those sages who (like Leucippus, Democritus and Epicurus) assumed
material principles such as the atoms, and who explain everything by
their motion, their shock and combinations, pretend that everything
existent and occurring is caused by the agency of these atoms, their
"actions and reactions." This includes, according to them, our
appetites and dispositions. The necessity residing in the nature of
these principles, and in their effects, is therefore, by these sages,
extended to everything that exists. As to the (Ionic Hylicists), who
assume other physical (ultimate) principles, referring everything to
them, they thus also subject all beings to necessity.