The Math Mafia by Emily T. Hamilton is a historical account of mathematics education reform in twentieth-century America and how that movement played a role in shaping the broader contours of national education policy. Hamilton contends that a cohesive and well-organized community of advocates was instrumental in the rise of standardized testing and curriculum reforms, as well as federal involvement in classrooms, especially during the Cold War. The “mafia” at the center of Hamilton’s story includes mathematicians, educators, and researchers from universities, as well as members of government-funded organizations such as the National Science Foundation and various educational psychology circles. By positioning mathematics as central to national strength and security, these reformers established math education as a key area of federal focus.