The biological differences are tiny and insignificant for human populations if compared to clusters based on environmental differences. An urban born white student has more in common in behavior with an urban born black student than it has with a rural born white student. If we go past borders or land masses, you can have just a few miles difference and have two individuals with complete different culture, values and language.
Beyond that, if you know nothing of an individual and wanted to determine their culture, values and health, the highest predictor would be neither where they live or race. It would be social economic status. Nothing beats clusters of high social economic status in determining behavior and outcomes. It is for example why crime research generally ignore race now days in favor of social economic status, with race seen as less scientific. Universities does the opposite which is a bit ironic.
>The biological differences are tiny and insignificant for human populations if compared to clusters based on environmental differences.
You meant “the biologically induced behaviour differences” didn’t you? Because otherwise in general it’s trivially false. It’s the reason why actually blacks in the USA suffered during decades from being prescribed drugs whose safety were nearly exclusively tested on white males.
In medicine there is many examples where genetics and environment create a difference for people. A person can have a multiple higher risk of diabetes just because they were born by parents with thrifty metabolism, caused by them or their parents eating a non-western diet.
This doesn't mean there are significant biologically different from any other human. As a species, we, humans, have a natural wide range of adeptness to the environment. Some of that can carry with people for centuries or even longer.
If we compared to what is common for all humans those differences are tiny and rather insignificant. Compared to social economic status, race differences are much smaller and tiny. If a scientist did a study comparing medical outcomes of a drug, selecting top 1% wealthy whites and compare to bottom 1% poor black, the results would not say much about how effective that drugs is based on race.
Beyond that, if you know nothing of an individual and wanted to determine their culture, values and health, the highest predictor would be neither where they live or race. It would be social economic status. Nothing beats clusters of high social economic status in determining behavior and outcomes. It is for example why crime research generally ignore race now days in favor of social economic status, with race seen as less scientific. Universities does the opposite which is a bit ironic.