This unique reference offers a quick and convenient overview of the key thinkers in international relations in the twentieth century. The inclusive coverage ranges from politicians such as Lenin and Kissinger, to the most influential figures in feminism, nationalist studies and even historical sociology. Each entry describes the main elements of each thinker’s contribution to the study of international relations, provides relevant information on his or her life and career, and lists valuable suggestions for further reading and critical analysis. Political science and journalism students, media professionals and anyone with an interest in modern international relations will want this useful work.