I recently discussed with an intelligent and well-disposed man the threat of another war, which in my opinion would seriously endanger the existence of mankind, and I remarked that only a supranational organization would offer protection from that danger. Thereupon my visitor, very calmly and coolly, said to me: "Why are you so deeply opposed to the disappearance of the human race?".
Albert Einstein (2011). “Out of My Later Years: The Scientist, Philosopher, and Man Portrayed Through His Own Words”, p.32, Open Road Media