There are a lot of unproven assumptions there, such as that the education is a decreasing factor of population growth. That is only a correlation. I don't claim

There are a lot of unproven assumptions there, such as that the education is a decreasing factor of population growth. That is only a correlation. I don't claim to know exactly how things are revolving in this matter, but as an educated guess I can say that, outside the necessary physical conditions (like enough nourishment and such), the culture of family is the most influential here. The education and the opportunities it opened for a better life just happened to be seductive enough to attract the individuals out of that family culture, but I wouldn't take this effect for granted.