You don’t need CRISPR for sex selection—-it can already be done as part of the preimplantation screening for IVF. For the other things, the best editing techni

You don’t need CRISPR for sex selection—-it can already be done as part of the preimplantation screening for IVF. For the other things, the best editing technique in the world is useless without a known and well-defined target. Intelligence is certainly partly heritable, but it’s not like there’s a single switch that needs to be toggled: genome-wide association studies find hundreds or thousands of linked genes—-and many of them likely have multiple functions. I would bet over-expressing any single one of them leads to many, many more problems than it solves.