In 1954, the Supreme Court’s Brown v. Board of Education opinion relied on social science research to overturn Plessy v. Ferguson’s separate but equal doctrine. Since Brown, social science research has been considered by the Court in cases involving equal protection challenges to grand jury selection, death penalty sentences, and affirmative action. In 2016, Justice Sotomayor cited an influential piece of social science research, Michelle Alexander’s The New Jim Crow: Mass Incarceration in the Age of Colorblindness, in her powerful Utah v. Strieff dissent. Sotomayor contended that the Court’s holding overlooked the unequal racial impact of suspicionless stops. Though the defendant in Strieff was white, Sotomayor emphasized that “it is no se...