✔ 最佳答案
We're reluctant to impose sterilization on individuals at all now due to the excesses of the past.
> down syndrome
People with Down syndrome have reduced fertility already.
A guardian or caretaker can request the sterilization, but that would have to be processed on an individual basis by a court in most USA states.
> Would it make sense to edit our genetics to make a more perfect human being?
Not yet. Our methods for editing the genome aren't good enough for human use.