If the civil and political rights of both races be equal, one cannot be inferior to the other civilly or politically. If one race be inferior to the other socially, the Constitution of the United States cannot put them upon the same plane.

How does this relate to the premises of Brown v. Board of Education?
The Brown case questions whether separate schools based on race inherently render one inferior to the other.
The Brown case questions whether educators treat students differently based on their race.