Ian Shapiro, Sterling Professor of Political Science and Global Affairs at Yale, examines how money shapes American political power in this DeVane Lecture from his course Power and Politics in Today's World. He works through the supply and demand sides of political money, starting with myths and realities about the courts, then tracing First Amendment doctrine since Buckley v. Valeo. He connects that legal history to the changing media landscape and closes by analyzing why demand for campaign money rises in a system of weak political parties. The lecture builds toward the book After the Fall, which grew out of this course, and treats campaign finance as a structural problem rather than a simple story of corruption. Delivered to Yale students and the public in fall 2019, it assumes some familiarity with the course's earlier sessions on democratic institutions.