Some mathematicians ran some numbers and diferent societies have different lowlying fruit. None of his improvements get societies to 2.1, but will theoretically move them to ~1.8. I'll find the source if people ask. 1. End toxic masculinity (machismo) in middle east and LatAM. No woman who knows how to read want to beaten or enslaved. 2. Jobs and Housing: Europe and America respectively. More three bed-room houses would add kids in California for example. Jobs for young people would children in Spain. 3. End afterschool tutoring and add spaces at universities. In Japan, Korea, China having more than one child means less money for tutors for the first kid (boy or girl). This is the easy stuff. For the extreme right, male literacy is inversely proportional with fertility too. lol! For my lefty friends, women are currently having as many kids as they would like, that's a oppression or tragedy or unfair.