b. 1951
Stewart Shapiro (b. 1951) is an American philosopher at Ohio State University, best known for developing ante rem structuralism — the view that mathematical structures exist independently of any systems that instantiate them. He has made major contributions to philosophy of mathematics, philosophy of logic, and the theory of vagueness.
Developed ante rem structuralism as a major position in philosophy of mathematics
Authored 'Foundations without Foundationalism' (1991), a sustained defense of second-order logic
Authored 'Philosophy of Mathematics: Structure and Ontology' (1997), a landmark text in the field
Developed a contextualist approach to vagueness in 'Vagueness in Context' (2006)
Extensive editorial and scholarly contributions to philosophy of logic and mathematics