I do not know with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. Letter to Harry S. Truman.

Britain and France had to choose between war and dishonour. They chose dishonour. They will have war. To Neville Chamberlain in the House of Commons, after the Munich accords (1938).

If Hitler invaded Hell I would make at least a favourable reference to the devil in the House of Commons. Speech after the German invasion of the Soviet Union (June 1941).

Unless some effective world supergovernment for the purpose of preventing war can be set up ... the prospects for peace and human progress are dark ....If .... it is found possible to build a world organization of irresistible force and inviolable authority for the purpose of securing peace, there are no limits to the blessings which all men enjoy and share.