Abstract

A Thomistic ontology of spacetime seems impossible, given Thomas Aquinas’s (1224–1275) outdated science and mathematics. By extension, it would seem that his modern followers are foolhardy to attempt to defend such a view. Indeed, a critique of Jacques Maritain by Adolf Grünbaum proceeds apace, dismantling his attempts to save Thomistic philosophical realism from Einstein. However, Grünbaum’s attack was given in better form thirty years prior by the Belgian Thomist Charles De Koninck. The two critiques are analyzed here. De Koninck’s arguments are superior to Grünbaum’s due to their greater precision as refutations as well as their more adequate ontology of spacetime, made possible but not explicit in Thomistic philosophy.