system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Is a race to a human like a breed is to a dog?
gpt
Yes, basically.  All dogs are the same species.  The different breeds are just collected phenotypes that we lump together and name.

Same thing about human races.  What we call a "race" isn't a thing, it is a collection of similar phenotypes that we've lumped together and given a name.

The races/breeds *could* eventually lead to new species if left isolated long enough, but for both humans and dogs, that's a long way off.