There are differences across "races" of course and obviously but there is a broad spectrum of human diversity, inter-ethnic, or national differences, by origin, by religion, and also biological differences between individuals, like obviously "height" or "body type" endomorph, ectomorph, exomorph. Overall its 99.99% universally since always even in imperialism times accepted that all humans are the same species, and that all are humans, so the differences are rather minimal compared to the commonalities. Its a false evil ideology to claim differences based on race, nowadays its unheard of anymore, but back then people justified slavery based on race, like that certain races like negroes are 3/4 of a human and they made the argument "with differences between races".