People say black negroid built America, that claim is false the negroid didn't get off the boat with a tape measure and building skills the negroid even today doesn't have that skill set.

Blacks only did farm labor until some picked up skills from the white man and could work on more complicated tasks.

Even today in Africa the tribesman have yet to build a two story structure and without knowledge shared by white people the blacks would still be stuck in the stone age, nobody can dispute that.