How does the last supper represent humanism?

Can someone me write a paragraph on this topic i feel confused

Otto von bismarck once said that a great war might someday be caused by some damed foolish thing in the balkans was he right, explain

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