Working within the framework of Thomistic metaphysics, Mariusz Tabaczek O. P. has developed a version of Catholic theistic evolution that includes speciation, human origins, and the origin of life. He assigns biological evolution to the domain of divine governance rather than that of creatio ex nihilo which only applies to primitive matter and human souls. This article reviews Tabaczek’s work with an emphasis on his argument for the compatibility of hylomorphism and evolutionary change through the eduction of novel substantial forms.