The geneticists, if you read their papers, have long been using code words. They sort of dropped the term "race" about 1980 or earlier, and instead y… - Nicholas Wade

Tribal behavior is more deeply ingrained than are mere cultural prescriptions. Its longevity and stability point strongly to a genetic basis. This is hardly surprising, given that tribes are the default human social institution. The inbuilt nature of tribalism explains why it took so many thousands of years for East Asians and later Europeans to break free of its deadening embrace.

Over the last 50,000 years, modern humans have been subjected to enormous evolutionary pressures, in part from the consequences of their own social culture. They explored new ranges and climates and developed new social structures. Fast adaption, particularly to new social structures, was required as each population strove to exploit its own ecological niche and to avoid conquest by its neighbors. The genetic mechanism that made possible this rapid evolutionary change was the soft sweep, the reshaping of existing traits by quick minor adjustments in the sets of alleles that controlled them. But what began as a single experiment with the ancestral human population became a set of parallel experiments once the ancestral population had spread throughout the world. These independent evolutionary paths led inevitably to the different human populations or races that inhabit each continent.

Many forms of new knowledge are potentially dangerous, the energy of the atom being a preeminent example. But instead of curtailing inquiry Western societies have in general assumed that the better policy is to continue exploration in confidence that the rewards can be reaped and the risks managed. It is hard to see why exploration of the human genome and its racial variations should be made an exception to this principle, even though researchers and their audience must first develop the words and concepts to discuss a dangerous subject objectively.