  Finally, it should be noted that Popper introduced a contrast between methodological individualism and “psychologism,” viz., the view that “all laws of social life must be ultimately reducible to the psychological laws of ‘human nature’”(1945, 89).  Nevertheless, in Popper’s formulation, methodological individualism does appear equivalent to at least some form of psychological reductionism. At very least, his formulation – and later Watkins’s – left many commentators confused about how one could affirm the former without committing to the latter (Udehn 2001, 204). More generally, it created a great deal of confusion about the difference between methodological individualism and atomism (Hodgson 2007, 214).