According to the supreme court, why was the doctrine of "separate but equal" no longer acceptable?

Decided in the case "Brown V. Board of Education of Topeka," the notion of "separate but equal" was no longer acceptable because this notion is inherently unequal. By segregating schools based on race, a divide between the races was produced. Specifically, black school children, even in schools that were "materially equal," had more issues of feeling inferior to whites and being looked down upon by them. This violated the 14th Amendment's Equal Protection Claus.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

your answer would be just capitalism.