As of fall 2020, the Republican Party controlled state legislatures and governorships in 21 states-one of the largest sustained advantages the party has had since the New Deal. After the GOP wave of 2010, a broad swath of states began considering and enacting a near-identical set of conservative priorities-often even using the exact same text. Where did this flood of new legislation come from? How did so many states arrive at the same proposals at precisely the same time? As Alexander Hertel-Fernandez shows in the eye-opening State Capture, the answer can be found in a trio of powerful interest groups: the Koch Brothers-run Americans for Prosperity (AFP), the American Legislative Exchange Council (ALEC), and the State Policy Network (SPN). Drawing from an impressive evidence base, he explains how, since the 1970s, conservative activists, wealthy donors, and big businesses constructed a right-wing "troika" of overlapping and influential lobbying groups. But State Capture is about more than this. It also teases out how conservative-corporate mobilization has fostered epochal shifts in the American political economy: the decline of unions, party polarization, and the skyrocketing concentration of wealth. State Capture is essential reading for anyone interested in understanding why the American political system favors the interests of the wealthy to such an extreme degree.