“…In fact, early IR realism was initially defined by a parallel quest to challenge especially Hans Kelsen's neo-Kantian account of international law, which Morgenthau and others (most notably, John Herz and Georg Schwarzenberger) thought unduly neglected 'the sociological context of economic interests, social tensions, and aspirations for power', or what Morgenthau alternately described in a crucial 1940 article from the American Journal of International Law as 'the social sphere, comprehending the psychological, political, and economic fields' (1940, pp. 269, 283;Jütersonke, 2010;Scheuerman, 2012). In this early formulation, realism aimed at a 'sociological' corrective to Kelsen's pure theory of law, which envisioned law as a system of norms neatly separated from sociological (or social scientific) inquiry, on the one hand, and ethics, on the other.…”