b. 1959
Achille C. Varzi is a contemporary Italian-American philosopher and Professor of Philosophy at Columbia University, recognized for foundational contributions to formal ontology, mereology, and the philosophy of language. His work examines the metaphysics of parts and wholes, spatial boundaries, vagueness, and the ontology of holes and events. He is a leading figure in the analytic tradition of formal metaphysics.
Co-developed a landmark theory of spatial representation and location in 'Parts and Places' (with Roberto Casati, 1999)
Advanced the formal study of mereology, including mereotopology and the metaphysics of boundaries
Contributed influential analyses of vagueness and indeterminate identity in ontology
Developed accounts of holes as ontologically dependent entities (with Casati, 'Holes and Other Superficialities', 1994)
Explored the ontology of events, processes, and the logic of change