Perfectionism, no less than isolationism or imperialism or power politics, may obstruct the paths to international peace. Let us not forget that the retreat to isolationism a quarter of a century ago was started not by a direct attack against international cooperation but against the alleged imperfections of the peace.

Franklin Delano Roosevelt (1882-1945) American lawyer, politician, statesman, US President (1933-1945)

State of the Union address (6 Jan 1945)