Abstract

Late in his life Leibniz famously recounted his philosophical conversion, at the young age of fifteen, from scholasticism to mechanism. Most Leibniz scholars have accepted Leibniz’s claim in this regard and have read his early works in philosophy and physics as various attempts to work out some variant of the mechanist position. However, Leibniz also makes it clear that he later came to realize the inadequacy of mechanism and, most would argue, this realization led him to reintroduce substantial form into his ontological inventory in 1679.