Literally everyone in the age range to be a potential parent. Perhaps drawn once a year. The winners can have children this year, while the others cannot. If both people in a couple win they can have two or something. Non-heteronormative couples and artificial insemination is fine. If someone wins and chooses not to have children that year or is unable for whatever that’s completely fine.
what policy can you introduce that doesn’t favor a specific trait?
A randomized lottery system.
who gets enrolled?
Literally everyone in the age range to be a potential parent. Perhaps drawn once a year. The winners can have children this year, while the others cannot. If both people in a couple win they can have two or something. Non-heteronormative couples and artificial insemination is fine. If someone wins and chooses not to have children that year or is unable for whatever that’s completely fine.