Why did the nation-state emerge and proliferate across the globe? How is this process related to the wars fought in the modern era? Analyzing datasets that cover the entire world over long stretches of time, Andreas Wimmer focuses on changing configurations of power and legitimacy to answer these questions. The nationalist ideal of self-rule gradually diffused over the world and delegitimized empire after empire. Nationalists created nation-states wherever the power configuration favored them, often at the end of prolonged wars of secession. The elites of many of these new states were institutionally too weak for nation-building and favored their own ethnic communities. Ethnic rebels challenged such exclusionary power structures in violation of the principles of self-rule, and neighboring governments sometimes intervened into these struggles over the state. Waves of War demonstrates why nation-state formation and ethnic politics are crucial to understand the civil and international wars of the past 200 years.

Andreas Wimmer's research brings a long term and globally comparative perspective to the questions of how states are built and nations formed, how individuals draw ethnic and racial boundaries between themselves and others, and which kinds of political conflicts and war results from these processes. Using new methods and data, he continues the old search for historical patterns that repeat across contexts and times. He has pursued this agenda across the disciplinary fields of sociology, political science, and social anthropology and through various styles of inquiry: field research in Oaxaca (Mexico) and Iraq, comparative historical analysis, quantitative cross-national research, network studies, formal modeling, the analysis of large-scale survey data, as well as policy oriented research.

Andreas Wimmer was educated at the University of Zurich, from where he received a PhD in social anthropology in 1992 and a habilitation two years later. He joined Columbia University in 2015 as the Lieber Professor of Sociology and Political Philosophy. He previouly taught at Princeton University, where he also served as director of the Fung Global Fellows Program, and at the University of California Los Angeles (from 2003 to 2012). Before moving to the United States, Wimmer was founding director of two interdisciplinary research institutes: the Swiss Forum for Migration and Population Studies at the University of Neuchâtel (from 1995 to 1999) and the Department of Political and Cultural Change at the Center for Development Research of the University of Bonn (from 1999 to 2002).