If the soul were a second substance in the bodily substance, some third intermediary principle would be needed to bind these two substances together (DQS resp 6), whereas it was supposed to be the soul itself that unifies the human. Powerful though these considerations are, Aquinas’ view faced more stiff opposition than the hero in a zombie movie. Bonaventure’s student John Pecham was just one figure who insisted on form pluralism, condemning the Thomistic doctrine in 1284, a decade after Aquinas died. Another posthumous attack came from William de le Mare,
