I had hoped to be the first person to do germline editing in a human (in the late 1980s, as a teenager, that was my goal). I spent about 20 years learning everything I could about human health and the relationship between the genome and visible phenotypes (from molecular to organismal). I concluded that while in principle, you could do germline editing ethically, the technology, and people's ethical maturity are both not at the point where we can do this. Also, if we did it, it would be a group effort not a single scientist acting rogue who didn't even get the details right.