 The early phase of scientific pluralism in the United States differed from its European counterparts in being less engaged with the social and political organization of science and more focused on questions of theory reduction and physicalism that were promoted both by émigré logical positivists and a new generation of American philosophers like Nagel (1961), Suppes’ doctoral advisor. In the United States, scientific pluralism thereby became framed as a counter-program to unity of science (see Galison &amp; Stump [eds.] 1996) and Alan Richardson (2006: 3) has aptly described pluralism as a continuing key topic