Reaction for Diamond

Diamond insists that dividing people into some races is nonsense, because human beings are all one species.
According to Diamond, there are three ways to divide people into some races, which are natural selection, sexual selection and no-function division. However, these division was not concordant and how to divide is very up to people, accordingly, very subjective.

I agree with Diamond's opinion. As he insists, human beings are all one kind of creature. Even though they look different, we can interbreed each other, and our gene is almost same.
It is very difficult to accept the difference, but we should accept it. If we can accept that we are all the same "human beings", the conflicts which occur between different races will disappear.