To be precise, and IIRC, Gates’ position (prior to the advent of literal killer vaccines) has been: Parents in the developing world will observe that reliable vaccines are readily available to protect children against premature death by various previously lethal diseases, and will respond to that infirmation by deliberately having fewer children.
As in, there is no longer an abiding need to keep having more children to increase the odds that a decent number of one’s children survive childhood.
“keep having more children to increase the odds that a decent number of one’s children survive childhood.”
Because the children are needed to work in the fields and textile mills?
/19th century