1899 – 1983
Donald C. Williams (1899–1983) was an American analytic philosopher at Harvard University, best known for reviving and systematizing trope theory — the view that the fundamental constituents of reality are abstract particulars (tropes) rather than universals or bare particulars. His 1953 paper 'On the Elements of Being' remains a landmark in analytic metaphysics. He also contributed to philosophy of time, modal ontology, and the metaphysics of propositions.
Revived and systematized trope theory as a foundational ontological framework in analytic metaphysics
Argued in 'On the Elements of Being' that all entities are composed of abstract particulars (tropes)
Defended a four-dimensionalist (worm theory) account of persistence through time
Contributed to modal ontology, including views on propositions and their world-relative existence
Long-term faculty at Harvard, influencing a generation of analytic metaphysicians