The white man's burden represents the Shift from isolation to imperialism in the United States.
Step-by-step explanation:
The white man's burden is a poem by Rudyard Kipling which represents the United States shift from Isolation i.e keeping to themselves and not letting others interfere in their matter to Imperialism which means expanding their influence throughout the world through peace and power.
Thus, the white man's burden here means the struggles and problems faced by the country with the coming of imperialism.