“I call on every man and woman of good will all over America today …to take a stand on this issue. Tomorrow may be too late. The book may close. Don’t let anyone make you think that God chose America as his divine messianic force, to be a sort of policeman of the whole world. God has a way of standing before the nations with judgment, and it seems that I can hear God saying to America ‘You are too arrogant! If you don’t change your ways, I will rise up and break the backbone of your power! And I will place it in the hands of a nation that doesn’t even know my name. Be still and know that I am God.'”

— Martin Luther King, 4 April 1967 (one year before his assassination)