In this sweeping look at American politics from the Depression to the present, Doug McAdam and Karina Kloos argue that party politics alone is not responsible for the mess we find ourselves in. Instead, it was the ongoing interaction of social movements and parties that, over time, pushed Democrats and Republicans toward their ideological margins, undermining the post-war consensus in the process ... In Deeply Divided, McAdam and Kloos depart from established explanations of the conservative turn in the United States and trace the roots of political polarization and economic inequality back to the shifting racial geography of American politics in the 1960s.