The purpose of this chapter is to offer an analysis of Thurgood Marshall’s heroic contribution though an understanding of his own personal heroic transformation. In doing so, I will describe the impact of a mentorship relationship in Marshall's development, and define the ten dimensions of transformation that heroes, in general, may undergo during their journey. I will also discuss the moral, intellectual and emotional transformation that Marshall personally experienced while also evaluating which of the “great eight traits” of heroes Marshall possessed. Finally, I will conclude by discussing his pathway of trans-formation and his personal sacrifice that made him into the American hero he is remembered to be today.