I recently learned something like this. I may be wrong, but I believe your answer is that the Supreme Court thought it was "unconstitutional"
Well... The entire world was subject to some form of Imperial influence or outright colonisation. But due to the wording of the question, I'll just list the Americas, Africa, Asia (this includes the Middle East) And Australasia.
By them seeing people don’t just have to work individually being a group and workin as one makes things better
The rising of KKK killings in the South