Henry Nelson Goodman (1906–1998) was one of the most influential philosophers of the post-war era of American philosophy. Goodman’s philosophical interests ranged from formal logic and the philosophy of science to the philosophy of art. In all these diverse fields Goodman made significant and highly original contributions. Perhaps his most famous contribution is the “grue-paradox”, which points to the problem that in order to learn by induction, we need to make a distinction between projectible and non-projectible predicates.  Other important contributions include his description of the technique which would later be called “reflective equilibrium”, his investigation of counterfactuals, his “irrealism”, his development of mereology (with Henry S. Leonard), a nominalistic account of logical syntax (with W.V. Quine), his contribution to the cognitive turn in aesthetics, and his general theory of symbols.