Chapter 6 explores the influence of the two ‘great powers’, Great Britain and the United States of America, on the development of the League's 1928 Models. It has been said that the United States of America significantly influenced the development of the 1928 Models, but that does not seem to be the case. Due to domestic politics, America was not involved in the League’s work on double taxation until 1927, and thus was limited in its influence given the continuous nature of the League’s work. In contrast, Britain exerted more influence as it was involved in the League’s work from the beginning, and was considered ‘a great economy’ that needed to agree to the proposals. Many compromises were made for the British position.