The Importance of Child Focused Selection

In general I think the principle should be child focused. We should choose those traits that make that child's life go as well as possible unless that child will represent a direct threat to other people. If somebody wanted to engineer or select for extreme ferociousness and viciousness or psychopathy, we have a legitimate reason to veto that kind of choice. But this sporting example is an interesting one because there is a gene that's been identified the ACTN3 gene which if you've got two copies of one version, you're more likely to be good at sprint events. That's a sort of thing we should just give people freedom to make their own choices about what sort of child they want to have