Not all humans can be concert pianists. Some humans can’t speak or get out of a wheelchair or remember their daughter’s name anymore. Here we enter into moral and ethical issues.
Evolutionary biologist David Barash is a man on a mission. He wants to make sure that we all know we are only human, and that means we are only animal.
Truth, beauty, and goodness are abstract concepts that correspond to our deepest desires. They are not likely to have evolved by a neo-Darwinian process.
A bottleneck of two, or a first pair at our origin older than 500,000 years, is possible.
In effect, protein engineers are using the power of random change plus intelligent design to see what if anything will improve function.