isn't it obvious?

“..we have about 50% of the world’s wealth, but only 6.3% of its population... In this situation, we cannot fail to be the object of envy and resentment. Our task in the coming period is to devise a pattern of relationships which will permit us to maintain this position of disparity without positive detriment to our national security. To do so, we will have to dispense with all sentimentality and day-dreaming; and our attention will have to be concentrated everywhere on our immediate national objectives. We need not deceive ourselves that we can afford today the luxury of altruism and world-benefaction... We should cease to talk about vague and - for the Far East - unreal objectives such as human rights, raising the living standards, and democratization. The day is not far off when we are going to have to deal in straight power concepts. The less hampered we are by idealistic slogans the better.”
George Kennan, head of the State Department planning staff,
Policy Planning Study (PPS) 23, Feb. 1948
Turning the Tide, US Intervention in Central America and the Struggle for Peace,
Noam Chomsky
South End Press, 1985. p. 48)