How does someone become a Supreme Court justice? Theoretically, anyone who can get nominated by the president and confirmed by a majority vote of the Senate can be a Supreme Court justice. ‘The justices’ examines the membership of the Court in history and now. Initially, the Court's membership was entirely Protestant, white, and male. That has changed considerably over time. A justice's place of origin is generally viewed as irrelevant but for many years, presidents have tried to achieve a geographic balance on the Court. The modern court also lacks diversity of professional background. So how can substantial changes in outlook be explained among a group of mature, professionally experienced individuals?