America cannot be the world's policeman. But we must reject the new isolationism that says: don't help anywhere, because we can not help everywhere.
In a complex and challenging time, the road of isolationism and protectionism may seem broad and inviting yet it ends in danger and decline.
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.
Jeffersonian isolationism expressed an essentially cosmopolitan spirit. The Jeffersonian was determined — even at the expense of separating himself from the rest of the globe, and even though he be charged with provincial selfishness — to preserve America as an uncontaminated laboratory.daniel j. boorstin