Influenced by similar historical forces and intellectual trends, the fields of anthropology and international relations have begun collaborating in areas such as migration, human security, and non-state activism. One area of potential interest to international relations scholars is archaeologists’ study of the emergence, development, and decline of states. Another area is cultural anthropologists’ study of war, peace, and violence. Both international relations scholars and cultural anthropologists have begun studying non-state actors and globalization, as well as transdisciplinary topics such as gender, human rights, and nationalism. Moreover, international relations research on ethnic conflicts is growing, with many scholars drawing from anthropological works on the link between internal political processes and ethnic violence. Another area in which some international relations scholars and anthropologists have collaborated is human security; increasing numbers of anthropologists are studying cultures undergoing armed conflict. One controversial arena was applied anthropology’s recent involvement in U.S. military efforts in the Middle East. Most anthropologists agree that the use of anthropology for national defense purposes violates anthropology’s code of research ethics. Overall, the field of international relations has shown increasing interest in the question of “culture” and in the qualitative research methods that characterize anthropological research.