... I am referring specifically to the Emancipation Proclamation that, while morally the right thing to do, proposed to remove whole sections of the law of several states)
Those who lose wars often find themselves in such a state of affairs.
I hear apocryphally that MacArthur handed the Japanese their new constitution on a 8 1/2 by 14 yellow sheet of legal paper. It even told them what forms their religion could not take.