The term 'white man's burden' refers to the notion that Western powers have a moral obligation to 'civilize' non-Western peoples, often used as a justification for colonialism and imperialism. This idea encapsulates a sense of superiority among Western nations, suggesting that they are responsible for the welfare and development of those they colonize, portraying imperialism as a benevolent endeavor. It reflects both the paternalistic attitudes of the time and the economic and political motivations underlying colonial expansion.