What was the first important civil rights case that came before the warren court?

The court was both applauded and criticized for bringing an end to racial segregation in the United States, incorporating the Bill of Rights (including it in the 14th Amendment Due Process clause), and ending officially sanctioned voluntary prayer in public schools. The period is recognized as the highest point in judicial power that has receded ever since, but with a substantial continuing impact.

Acase involving the laws of a single state.

(c) spain left the philippines to the usa