How was the world divided into different races of humans?

Question: How was the world divided into different races of humans!?

hey, this for my homework, please help!.!.!. thanks :)Www@QuestionHome@Com

Best Answer - Chosen by Asker:

EVOLUTION!.!.!. Mankind started in Africa and, during THOUSANDS of years and much wandering, the different races EVOLVED from the originalWww@QuestionHome@Com

the races started cuz the people HAD to change so they could live along with the enviorment for example if colored people did not have dark skin they would be having sun burns 24/7 their skin changes to match the enviorment it the same with all races!Www@QuestionHome@Com

the world has divided into many parts like Muslim world, Christan world, Jews world, and rest of the world!.

what about nuclear world non-nuclear world!.Www@QuestionHome@Com

Just human mentality changed the world and divided into parts!.Www@QuestionHome@Com