Definition: this was the african-american lawyer who won the brown v. board of education case in 1954 and eventually became the first african-american supreme court justice in 1967.

Brown v. Board of Education

https://en.wikipedia.org/wiki/Brown_v._Board_of_Education

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.