The word you're looking for is breed: a set of common phenotypes, resultant from the interaction of environment and genotype, none of which are relevant because people now have infinitely greater freedom of movement than they did in more primitive times. It is a strictly anatomical phenomenon, and has no effect on the defining characteristics of any member of the species.
'Race' is a term that imagines a causal relationship between the cultural habits of people of a certain phenotypic set, and their appearance. It's an invalid concept. There may be correlation, but there is no causation involved. Belief in the idea that genetics determine cultural attributes is the essence of racist thought, whether it be supremacist or egalitarian.
Breed is more like Rottweiler vs dachshund, which were developed by selectively BREEDING various examples which have certain physiological traits to yield offspring with those traits to eventually produce a life form that has the final set of traits that the breeder was deliberately engineering.
Race is not a species. Race is a subgroup of a species that did not develop from selective breeding, but rather from the direct adaptation of a life form to it's physical environment.
You could almost use the word evolution, but that has a hierarchical connotation.
Race is simply a type of physiological characteristics developed by adapting to a specific environment for the purpose of realizing the most efficient physiology for that place, which conserves the most energy and yields the most potential for other things beyond basic survival, since less energy is wasted on things like shivering or sweating. The phenomenon clearly exists, and race is the word used to refer to it.
Since living in a certain area of the world tends to develop certain behaviors in order to survive, like routines, I'm thinking that the development of culture might in some way also might be related as well, and thus if so, race and culture developed simultaneously.
Because of this, I tend to think that the mores and traditions of a certain culture might be the most valid in their own, and less so in others, and in some cases, completely invalid in others. (Eskimos hunt for wild game in the wilderness, but that tradition would not serve much purpose in NYC.)
I'm not sure genetics develop cultural attributes, but the environment which develops certain genetics also develops certain cultural attributes as those people adapt their behavior to those environments, just as their genetics adapted to those environments after 20,000 years. There is the correlation, I think.
The environment causes genetic and cultural changes.
I don't think genetics cause cultural behaviors in the direct sense, except perhaps as instincts developed over thousands of years.
Certain types of tasks just come naturally with very little effort to some animals. I don't see why people should be completely different in this regard.
I really think that all people should be treated fairly regardless of racial or cultural background.
As far as race having no relevance today, black people have a higher incidence of rickets in Northern climates, because their darker skin, designed to block out too much sun at the equator, blocks out so much sun in the north that they don't synthesize enough vitamin D to assimilate calcium enough.
In Australia, white people have a very high skin cancer rate, while the Aborigines have almost none, if they have any at all, because their skin is dark enough to block out excessive sun in that sunnier climate.
Race is still relevant to human survival and quality of life, despite people having "infinitely greater freedom of movement" now.