the new genetics will reveal much less than hoped about how to cure disease, and much more than feared about human evolution and inequality, including genetic differences between classes, ethnicities and races.
That is Geoffrey Miller, who you may recall from my posts on his book Spent. His view is that people have genetic traits and it would be most efficient if we could just reveal them, but instead we go to great trouble and expense to send signals about our traits.
In theory, genetics does not have to bother with classes, ethnicities, and races. Why are we interested in those as units of analysis? Is it because we use them as signals, and so we are interested in how well genetic statistics confirm our hypotheses about signals? Or is it because, if you will forgive the expression, we are genetically programmed to view people through a tribal lens, and so we are just inherently interested in these group tendencies?