After years of dysfunction, the state of American politics is clear: Washington, D.C. is broken, and the public is too divided to fix it. How did we reach this desperate point? Doug McAdam and Karina Kloos of Stanford University answer this question inDeeply Divided: Racial Politics and Social Movements in Postwar America. Our extreme partisanship has less to do with party politics than it does with social movements rooted in years of economic and racial inequality. In their engaging book, McAdam and Kloos explain how the hyperpartisanship that has infected our leaders today actually began decades ago.