From 1967, when Thurgood Marshall took his seat as Supreme Court Justice, until 1990, when William Brennan, Jr. vacated his seat, the two Justices formed one of the most consistent liberal voting blocs in the history of the Court. Both Justices were judicial activists who labored in the tradition of Legal Realism. Although both Brennan and Marshall recognized the interpretation and application of the law as purposeful exercises, they differed in their approach to the task. Marshall, for instance, appealed to social consensus stating that his views were supported by society. Furthermore, Marshall strongly believed that the Constitution is a living document which evolves and can bring about future change. Brennan, on the other hand, was a str...