This paper analyses the intertwinement of legal philosophy and political theory in the British intellectual framework between the late 19th and early 20th centuries, with specific regard to Harold Laski's works. I will try to illustrate the transition from 19th-century utilitarianism to H. L. A. Hart and Isaiah Berlin as evolving through important debates which include Laski's contribution. I will argue that a discussion of “juridical” obligation, i.e., the conditions of legal validity, may lie implicitly in these concerns that Laski (...) and other early 20th-century British authors had about “political” obligation—viz., about the nature of the state and its claim to obedience. By approaching Laski's theories and their genealogy through a legal-philosophical perspective, I will contend that this debate about political obligation anticipates to a considerable extent some of the most renowned conceptions of obligation in 20th-century British legal theory. (shrink)