...not just with a face, every living thing on this planet is related.
I know that genus, species, race are all arbitrary but humans do fall into atleast 5 (ish) distinct races off the top of my head. It is no different to, say, giraffes, they have 9 races, the rothschild being the most well known, and they can interbreed, but they are genetically different.
You claim that any difference in race is environmental...which is simply not the case otherwise all Americans would have turned into native americans and all black people in the Uk would have turned white.
...I do know what you are saying, that the idea of different races is a social construct, I agree..but as evolution is one fluid line, so are most classifications.
I would say though, that this is more of a conversation about social ideas of race rather than genetic.