Nadia Bray

This study explores the doctrine of the latency of forms in the Middle Ages, with a particular focus on Albert the Great’s elaboration through his theory of inchoatio formarum. The doctrine, whose origins date back to Anaxagoras and was further developed in the Arabic philosophical tradition, posits that matter contains all the manifest qualities of substances, though in a latent form. Albert reworks this doctrine, correcting the immanentist and paradoxical implications attributed to Anaxagoras’ error, and proposes an interpretation in which matter, while potentially active, receives the perfection of forms from an external causal principle. The study highlights how Albert’s inchoatio formarum provides a response to the doctrine of the latency of forms and fits into the broader medieval debate on the relationship between matter and forms, both in philosophical and theological contexts. The discussion also examines the commentators of Peter Lombard’s Sentences and the connection with Augustine’s doctrine of rationes seminales. Lastly, Albert’s contribution to the debate on Augustine’s rationes seminales and his interaction with the Thomist tradition and other 15th-century authors are analyzed.