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Which country was the last to join the allied powers? o great britain o france o united states o china

What was significant about the 1896 supreme court rulling in plessy v. ferguson

The term 'white man's burden" refers to the difficulty of converting colonists to christianity. the belief that europe had a duty to civilize other people. the conviction that white people were superior to all others. the struggle to survive in an increasingly industrialized world.