A rich history of the development of American minimum wage policy with lessons for today. Despite broad popular support for robust minimum wage policy, the federal minimum wage is now worth less—in real, inflation-adjusted terms—than at any time since 1949. While some state and local governments have stepped in to fill this void, others have declined to set any minimum wage standard at all. Traversing more than 100 years of history, Raising the Floor examines how interest groups have navigated the highly decentralized American political system to shape the development of federal, state, and local minimum wage laws. In her analysis, Shanna Rose highlights the importance of American federalism. She argues that because federalism creates multiple arenas for policy change, interest groups have sought out the sites most conducive to their goals, shifting their lobbying efforts as new obstacles and opportunities emerge. Federalism has facilitated minimum wage policymaking by fostering policy experimentation, learning, and diffusion across states and by allowing state and local governments to overcome gridlock and status-quo biases at the national level. Yet, federalism has also been an instrument for containment, enabling those opposed to minimum wage increases to litigate and preempt local-level laws. With rich historical chapters that illuminate different phases in the development of today’s patchwork of wage standards, Raising the Floor is a deep examination of the past, present, and future of American minimum wage law.