I think temporary vasectomies should be mandatory for all young men, to avoid unwanted pregnancies. They can be reversed for wanted pregnancies, once they qualify with homes and sufficient salaries to support a family.
I think it should be at birth. Worldwide.
Then later it can be reversed, based on the decision of a committee of both men and women whose sole purpose is to decide who gets to give birth and who doesn't.
It seems absolutely obvious to me.