From an evolutionary perspective, the human races are all very similar variations of the same gene pool. The question that looms over all the social … - Nicholas Wade

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.

If running a productive, Western-style economy were simply a matter of culture, it should be possible for African and Middle Eastern countries to import Western institutions and business methods, just as East Asian countries have done. But this is evidently not a straightforward task. Though it was justifiable at first to blame the evils of colonialism, two generations or more have now passed since most foreign powers withdrew from Africa and the Middle East, and the strength of this explanation has to some extent faded.

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.