The main policy changed between presidents but a lot of it was containment of the spread of communism and some intervention against soviet backed coups such as Vietnam and places in Africa such as the Congo and the third was supporting EE countries and leave them open for influence by western powers and democratic powers
The White Man's Burden is a poem by Rudyard Kipling. Although the poem has deeper meanings, a direct reading was popularized from the dominant points of view at the time, justifying as a noble enterprise, an ungrateful and altruistic obligatio, the domain of " white man" on those defined as "inferior races".
Apparently, in a superficial reading, the subject is a rhetorical mandate to the white man to colonize the other races for the benefit of them, being their "burden" both the task and the people themselves to colonize. Because of this issue, as well as the resounding title, it soon became an emblem of colonial rule and white supremacists.