Technology, innovation, and industrialization increased the of conflict, as can be seen when one compares the thirty years war, the thirty years world war, and the thirty years of conflict that was world war i and world war ii.

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