Hedley Bull, in the passage in The Anarchical Society which introduces the ‘three competing traditions of thought’ associated with the articulation of the modern states-system, cited Otto von Gierke as the originator of this influential way of organising international theory. This article examines Gierke's work in order to assess the extent of the influence on the English School that can be ascribed to him. It argues that in fact Gierke's version of the three traditions bears little resemblance to that of (...) Bull, and that by ‘international society’ Gierke was referring to confederal structures of political power. Through an analysis of a significant strand of American revolutionary thought, the paper seeks to demonstrate the potential that further attention to the Gierkean understanding of international society could have for advancing the English School's research programme and building on its achievements. (shrink)