Hilary Putnam and Bas C. van Fraassen have been two pivotal figures in the scientific realism debate in the second half of the twentieth century. Their initial perspectives were antithetical—defining an archetypical scientific realist position (Putnam) and a major empiricism-inspired alternative to scientific realism (van Fraassen). But as the years (and the philosophical debates) went on, there have been important lines of convergence in the stances of these two thinkers, mostly motivated by an increasing flirting with pragmatism and by a growing disdain towards metaphysics. Putnam’s views went through two major turns, in a philosophical journey he aptly described as taking him “from realism back to realism” (1994, 494). Being an arch scientific realist in the 1960s and the early 1970s, he moved to a trenchant critique of metaphysical realism and the adoption of a verificationist-‘internalist’ approach (what he called pragmatic or internal realism), which he upheld roughly until the end of the twentieth century. Then he adopted a direct realist outlook, what he called “common sense” or “natural realism”, which was based on the denial of at least some of the tenets of his internalist period (e.g., the abandonment of a verificationist conception of truth), while at the same time tried to avoid “the phantasies of metaphysical realism”. It is (almost) impossible to cover all aspects of Putnam’s realist endeavours. I will therefore focus on his changing views about scientific realism. Van Fraassen occupied a space in the scientific realism debate that was left vacant by Putnam’s critique of fictionalism and verificationism, viz., an agnostic stance towards the ontological commitments of literally understood scientific theories. His positive alternative to realism, Constructive Empiricism (CE), was meant to be a position suitable for post-positivist empiricists, that is philosophers who a) take for granted the empiricist dictum that all (substantive) knowledge stems from experience; b) take science seriously (but not uncritically) as the paradigm of rational inquiry; and c) take to heart all criticism of the positivist approach to science, bound as it was to issues concerning the language of theories and the privileging of an alleged theory-neutral observational vocabulary...