New Books In Political Science

Polarization is a defining feature of politics in the United States and many other democracies. Yet although there is much research focusing on the effects of polarization on domestic politics, little is known about how polarization influences international cooperation and conflict. Democracies are thought to have advantages over nondemocratic nations in international relations, including the ability to keep foreign policy stable across time, credibly signal information to adversaries, and maintain commitments to allies. Does domestic polarization affect these “democratic advantages”? These are the questions that Rachel Myrick tackles in her new book, “Polarization and International Politics: How Extreme Partisanship Threatens Global Stability” (Princeton UP, 2025) In this timely book, Myrick argues that polarization reshapes the nature of constraints on democratic leaders, which in turn erodes the advantages democracies have in foreign affairs. Drawing on a range of evidence, including cross-national analys