Just a century ago White Americans had birth rates higher than Mexican Americans, Asian Americans or Black Americans do today.Maybe, just maybe, if Jethro stop inbreeding and committing incest, your fertility rate will increase.
Yeah, I know it's a part of your heritage and old habits are hard to break.
The Natural History of Inbreeding and Outbreeding:...- Page 395 -Google Books Result books.google.com/books... ... Nancy Wilmsen Thornhill - 1993 - Science ... increased mortality, decreased fertility, and lower (estimated) birth weights for inbred rhesus monkeys ...
Of course White Americans started to have low birth rates largely due to feminism.
Where women would spend their time going to college & work rather than putting as much effort into having babies.
With the change of feminist culture & also the change of the U.S society towards a less agricultural (Which more kids were needed to help with agricultural existence)
Then part of it is because of Enviromentalism has told many educated Whites that population harms the enviroment.
Then part of it is because many people had learned to have less babies than could have more money to provide more for their kids later on as well.
... So many factors due to cultural impacts have declined the birth rates of ALL AMERICANS & WESTERNERS & WELL... The world.
Nothing to do with infertility or inbreeding or anything like that.