British colonial policy initiatives of the 1760s and the American revolutionary war led to a period of sustained lobbying by the West India interest in Britain; lobbying which developed from an informal body into a more professionally organized lobby, along the lines of modern economic interest groups. The composition of the lobby and its activities during the revolutionary period are examined here. Its considerable influence is also assessed and explained. The article finds that the lobby won major concessions from the British government and vitally affected British policy towards North America. It nevertheless concludes that the lobby enjoyed its greatest influence in the early century when ironically its organization was weaker but its goals coincided more harmoniously with those of British colonial policy. Its later reorganization was a response to the increasing conflicts of interest between the white elites of the British Caribbean and the mother country which intensified during the period of the American revolution and its aftermath.