Race is a cultural concept.
Race is a cultural concept of how that culture understand something like white or black or asian or brown.
There's not a single unified definition of white or black over centuries, except phenotypically traits.
But such phenotypical traits can appear in populations that aren't considered of a certain race.
Like how iranians are considered a brown race, yet they can have blonde people with blue or green eyes and pink nipples, yet they are never considered whites.
Or you can have blonde blacks in solomon islands, even thought they're scientifically classified genetically as dravidians.
Slavs by example can be blonde with blue eyes, but they also have asian traits like having straight asian hair.
So race is a cultural definition, not a genetic definition like subspecies.
There's not a single unified definition of white or black over centuries, except phenotypically traits.
But such phenotypical traits can appear in populations that aren't considered of a certain race.
Like how iranians are considered a brown race, yet they can have blonde people with blue or green eyes and pink nipples, yet they are never considered whites.
Or you can have blonde blacks in solomon islands, even thought they're scientifically classified genetically as dravidians.
Slavs by example can be blonde with blue eyes, but they also have asian traits like having straight asian hair.
So race is a cultural definition, not a genetic definition like subspecies.