Black Americans have been living in the United States for hundreds of years since the colonial period in North America. Long-term historical integration has made blacks intermarry with whites, Indians, Latin Americans and Asians, and the skin color of blacks has been multiplied from generation to generation. The whole has been greatly improved, and now African Americans are whiter. Therefore, according to this trend, African-Americans will continue to be white, more pleasing to the eye, more beautiful and whiter.
Genetic reasons.
There are many black people in Africa, and the slave trade actually wants to sell at the best price. Basically, black people will choose those who are strong and have less dark skin. And black people who are not so ugly, give priority to trading. Basically, it is a narrow escape to reach the United States safely, and many people will die on the road. Therefore, blacks who arrive in the United States have a good foundation and obvious genetic advantages.
Climatic reasons.
The reason why blacks are black is related to the long-term ultraviolet radiation in equatorial Africa. The whole climate in North America is mild for a long time, with abundant precipitation and high humidity. More importantly, the climate is not hot, ultraviolet rays are not strong, and the living conditions of black Americans are better. In the long-term development, it is also important for each generation to be whiter and more pleasing to the eye.