They were not ended so he didnt do anything
The cause of Shay's Rebellion was the government was trying to take away the farmers land which led to all the farmers to rebel against the government. Many farmers were in debt at the time from taxes and lost their land. Daniel Shays rebelled to try to put an end to it.
The Plessy ruling allowed segregation which the Warren Court declared treated whites and blacks differently.
Well World War 1 had nothing to do with America at that time. But we entered due to the sinking of the ship, Lusitania. The German U-boats sunk it and our response was entering the war.
