"In today's hyper-partisan America, the party divide seems to loom over every facet of life, political or not. Yet central as they are, parties have proved unable to meet their core tasks: building resonant programs, organizing actors into ordered conflict, policing boundaries, and linking the governed with the government. To understand how we came to the dysfunctional system we see today, we look back at how the parties formed and when and why they started to fail. In this major new book in American political development, the authors offer a full historical account of modern party politics, beginning with the rise of mass parties in the Jacksonian era through the post-Obama Democrats and the post-Trump Republicans. They show dynamic changes in parties over time, identifying six recurrent approaches that parties have taken-accommodationist, anti-party, pro-capital, policy-reform, radical, and populist-and focus on how successive actors melded inherited forms together with novel approaches to construct new projects for power. They date the emergence of our hollow-party era to the demise of the "New Deal order" by the late 1970s. While acknowledging changes in both parties, the authors emphasize the decisive role of the right in bringing it about. With deep historical grounding and extensive original research, the authors argue that it was the Republican Party that broke American politics"