"Mainstream metaphysics" means categorialism. Everybody knows about genus/species hierarchy. "What is the relationship between categorialism and hylemorphism,

"Mainstream metaphysics" means categorialism. Everybody knows about genus/species hierarchy. "What is the relationship between categorialism and hylemorphism, Aristotle’s other major ontological theory? Where does matter fit, if at all, in the categorial scheme?" https://plato.stanford.edu/entries/aristotle-categories/ https://plato.stanford.edu/entries/aristotle-categories/