S. Marc Cohen's lecture notes on Democritus, considering this thinker in the broader context of Presocratic and Socratic thought.

Article by J.J. O'Connor and E.F. Robertson, from the MacTutor History of Mathematics Archive. Emphasizes this philosopher's work in physics and geometry.

Article from the Internet Encyclopedia of Philosophy, summarizing this thinker's life and teachings.

Article from the Wikipedia openly-edited encyclopedia.

An short introduction to this ancient atomistic thinker.

Brief discussion of Democritus' ideas.

This classical Greek thinker's fragments, arranged by subject. Adapted from the 1948 Freeman translation.