Most of the significant evolutionary pressures concern diseases, both inherited and acquired. Even the dumbest idiot is usually provided some sort of charity/hand-out in most societies. Intelligence needn’t necessarily be a force for evolution as much as the other factors are, in modern human beings. An exception to this would be among small groups of people living nomadic lifestyles, where the size of the group is too small for members to be able to compensate for the shortcomings of other members.
Most of the significant evolutionary pressures concern diseases, both inherited and acquired. Even the dumbest idiot is usually provided some sort of charity/hand-out in most societies. Intelligence needn’t necessarily be a force for evolution as much as the other factors are, in modern human beings. An exception to this would be among small groups of people living nomadic lifestyles, where the size of the group is too small for members to be able to compensate for the shortcomings of other members.
That’s fine, but the problem I have is the fetishtic focus on DNA, without discussion of the influence of methylation, and epigenetics. How these “evolve”, mutate, or get selected by cultural changes in diet, and other matters is a huge scientific void.