 Numenius presents his own doctrine of matter, which is clearly developed out of Plato’s Timaeus, as the work of Pythagoras (Fr. 52 Des Places). Matter in its disorganized state is identified with the indefinite dyad. Numenius argues that for Pythagoras the dyad was a principle independent of the monad; later thinkers, who tried to derive the dyad from the monad (he does not name names but Eudorus, Moderatus and the Pythagorean system described by Alexander Polyhistor fit the description), were thus departing from the original teaching. In emphasizing that the monad and dyad are independent principles, Numenius is indeed closer to the Pythagorean table of opposites described by Aristotle and to Plato’s unwritten doctrines. Since it is in motion, disorganized matter must have a soul, so that the world and the things in it have two souls, one evil derived from matter and one good derived from reason. Numenius avoids complete dualism in that reason does have ultimate dominion over matter, thus making the world as good as possible, given the existence of the recalcitrant matter.