  The theory known as “plurality of forms” is not just the theory that there are typically many forms in a material substance. That would have been an innocuous claim; everyone agreed that material substances routinely have many accidental forms. The theory of plurality of forms is instead the theory that there is a plurality of substantial forms in a given material substance. Details of the theory varied widely from author to  author.[6]  There was some disagreement over how many substantial forms were involved. Most people who held a version of this theory agreed that at least a “form of corporeity” was required in all physical substances, but they disagreed over how many additional substantial forms were required for a given kind of body. Particular attention was given to the case of the human body.