Fundamental Principles of the Sociology of Law, trans. by Walter L. Moll (New York: Arno Press, 1975 [1936]) (hereafter simply ‘Ehrlich’). I am grateful to Alex Ziegert for my first substantial introduction to Ehrlich: K. Alex Ziegert, "A Note on Eugen Ehrlich and the Production of Legal Knowledge" (1998) 20 Sydney Law Review 108.