Here is how I envision the world in this utopia. It would, over time, automatically sterilize considered unfit in terms of IQ or physical capabilitues or height or other markers of health, until we get down to the 500 million lucky human beings. Over time, it would raise the minimal markers and sterilize everybody underneath it. 4’11 minimal height today, 5’0 5 years from now and 5’01 in another 5 years.
Genetic testing at birth would be a norm and so would sterilization at birth be a norm.
And that will only be the beginning. Procreation won’t have to involve male-female relations either. (This is starting to sound like Orwell’s 1984.)