Except ideologies aren't genetic are they?

The trouble is that one of the main drivers of low TFR is labor policies. Feminism and "empowerment" and "equal rights", it turns out, were basically submarine propaganda for ensuring that women all enter the workforce, rather than learn how to be wives and mothers, and bear children.

Girls and women in the workforce, or training for careers rather than motherhood, are not going to stop because the population drops off. They are not going to stop without unapologetic reversals of these labor and education policies. Even among religiously devout sectors of the West, woman are essentially being presented with no choice but to go into careers and abandon motherhood for all intents and purposes.

I see this all the time in my Roman Catholic milieu. The crux of preaching certainly encourages women never to neglect motherhood or family life, but there is no cleric who wouldn't encourage girls to enroll in colleges, to seek careers in teaching and health care, or to stop volunteering and serving in active ministry for their parish. Basically, the Church has been cajoled and beguiled into selling this lie to women that they really "can have it all" without really making any sacrifices, or giving up any one thing, to be the best mother and wife that they could be.

Ultimately a family can train a girl to be a mother, or a worker, not either/or. Look at boys in the West. I was formed to work in an office, to go have a career and make money, and absolutely useless at any domestic task, such as cooking, cleaning, personal finance. A family has precious few formative years to teach their boy or girl how to be a parent, or how to be a good worker-bee, and these paths usually turn out to be mutually exclusive.

This aspect of equality and diversity is not really ideological, but it is fueled by labor policies that, once enacted, are not easily reversed. You can see how such policies expand the labor pool, inflate the workforce nationwide, and give a distinct national advantage over any nation, culture, or ideology that chooses to protect women and continue fostering motherhood and traditional families.