I don’t think genetic modification is a necessary pre-requisite. Having a market for sperm and eggs where the genetic value is known could be sufficient and thi

I don’t think genetic modification is a necessary pre-requisite. Having a market for sperm and eggs where the genetic value is known could be sufficient and this can be done with existing data science. Creating and testing a panel of IVF babies and selecting for certain genes and away from others would be a powerful evolutionary force.