One day the world will be mocha

In 1920, a man named Goddard wrote a book titled "Rise of the Coloured Empires". In summary, the book argued that if the supreme white race did not protect and maintain their status in the world, black, brown, and yellow races would rise up and take control of what was once under the control of the white race. What happens when interracial marriage continues and continues until the point where the whole world has blended into one giant race? I think we might all turn out to be light brown, or "mocha" colored. So if and when this does happens, how will we then classify ourselves. Will it be economic status? Will we still hold on to our notions of national division despite everyone retaining the same skin tone? I wish I could glance at the distant future to see what it would be like. Perhaps equal skin tone will help us achieve true equal opportunity.