Couldn't it not be a gene but a meme that is inherited, instead?
> Each generation has more of these people because they're the ones that reproduce.
I.e. each generation has more of these people since people who see having children as something positive reproduce and teach these values to their children.
Being a memetic instead of genetic factor would have the advantage that it is easier to "unprogram" it, i.e. by having rules/incentives in the society that discourage reproduction or by education.
> Each generation has more of these people because they're the ones that reproduce.
I.e. each generation has more of these people since people who see having children as something positive reproduce and teach these values to their children.
Being a memetic instead of genetic factor would have the advantage that it is easier to "unprogram" it, i.e. by having rules/incentives in the society that discourage reproduction or by education.