What act of violence did the proslavery people commit?

Why did president johnson decide not to run for reelection in 1968?

What are the major problems with a command economy?

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated