This volume deals with the philosophy and thought of Roger Bacon. Attention is given to a range of topics including: Bacon's life and work; his contribution to the "trivium" and the "quadrivium"; his notion of science; his moral philosophy; Bacon's contribution to medicine, alchemy and astrology; and his positions in physics and metaphysics. The volume seeks to situate Roger Bacon in the context of 13th-century philosophy and thought, as well as demonstrating his importance for later thinkers.