Marked differences in mid-twentieth-century reformers' approaches to politically active working women in Belize and Puerto Rico help to explain the emergence of colonial hegemony in the latter, and the rise of mass nationalism in the former. Reformers in both colonies were concerned with working women, but whereas British and Belizean reformers treated them as sexually and politically disordered, and aimed to transform them from militant wage-earners to clients of state social services, US and Puerto Rican reformers treated them as voting citizens with legitimate roles in the economy and labour movement. Although racialised moralism was not absent in Puerto Rico, the populism of colonial reform there helped cement a renegotiated colonial compact, while the non-populist character of reform in Belize – and the wider British Caribbean – alienated working women from the colonial state.