The Greco-Roman mathematician Claudius Ptolemy is one of the most significant figures in the history of science. He is remembered today for his astronomy, but his philosophy is almost entirely lost to history. This groundbreaking book is the first to reconstruct Ptolemy's general philosophical system-including his metaphysics, epistemology, and eth "The book can be accessed and appreciated with a little sustained effort. For those of us who practice the history of mathematics, Feke's work is a nice illustration that our historical actors' philosophical commitments often can be identifed, and they can help us to focus our readings more precisely. It's a good lesson, and well worth the endeavour."---Glen Van Brummelen, British Journal for the History of Mathematics