  Unfortunately, the version of methodological individualism that Popper bequeathed to his student Watkins was considerably more difficult to defend than the one he inherited from Hayek. Since the beginning, the precepts of methodological individualism were thought to have been imposed by the special requirements of the social sciences.  For both Weber and Hayek, it was the reflection of a key difference between the Geisteswissenschaften and the Naturwissenschaften. Popper, however, denies that there are any significant methodological differences between the two. Indeed, his initial discussion of methodological individualism in “The Poverty of Historicism,” occurs in a section called “The Unity of Method,” in which he claims that both are simply in the business of “causal explanation, prediction and testing.”(1945, 78). He goes on to deny that “understanding” plays any special role in the social sciences.