-He though utopians justified the interest of the dominant english speaking status quo powers
-He said utopians ignore the lessons of history, but the realists read history too pessimistically
-Idealists exaggerate freedom of choice, realists exaggerate fixed causality and slip into determinism.
-Idealists confuse national self- interest with universal moral principles, but realists are too cynical and deny that human thought modifies human action.
-To utopians, purpose goes over observation.