Cultures of Intelligence analyses the intelligence services of Germany, Britain, the USA, and France in the first half of the twentieth century. It asks whether there were national traditions in intelligence, or whether each of the sophisticated Western intelligence powers was part of a transnational intelligence culture? The book is a contribution to the cultural turn in intelligence studies. Its underlying purpose is to place intelligence in its proper historical and comparative context. As such it is also a contribution to the history of political culture and its study.