The Black Death plagues that killed most of Europe's population and spread by rodents seem less likely to impact the world now as agriculture is no longer primarily manual labor. Nature culled the overpopulation in Europe in order to raise the wages and productivity of mankind. Thus perhaps the causative history for why Europe favors birth control, late marriage (http://en.wikipedia.org/wiki/Hajnal_line), and population control propaganda.

http://unenumerated.blogspot.com/2013/11/european-asian-divergence-predates.html

http://blog.jim.com/economics/the-future-belongs-to-those-that-show-up/

Result of "Legal Equality for Women":


http://esr.ibiblio.org/?p=3000
(about hypergamy and the PUA game)

http://esr.ibiblio.org/?p=4934
(the false life plan is a dead end)

http://blog.jim.com/economics/the-cure-for-iq-shredders/
(top-down control is never the solution)