Originally Posted by tinyliny
I am wondering why line breeding is not so successful inhuman beings. The royalties of Europe had quite a bit of inbreeding or line breeding and didn't they end up with hemophilia and sterility issues? Or is that just old tales they tell?
Hemophilia isn't a result of line breeding. At least no more so than diabetes, breast cancer or any other potentially inherited medical condition. It spread through the royal families in Europe not from line breeding (Czar Nicholas had no blood relationship to HBM Victoria, but he did marry her granddaughter), but because Victoria passed on that gene to most of her female children and managed in a two generations to have much of her offspring married to various noble and royal houses in Europe. Which is why in 3 generations most of the royal families in Europe were related....they had all married members of, or had a parent that had been part of GB royal family.
In the US cousins were still getting married through the 1800's and in England it was still done into the 1900's although I think the practice finally stopped at some point in the 1900's (but not the early 1900's). I can't speak with any degree of knowledge about other countries, but it's a pretty safe bet Europe and most of the world wasn't much different than the US and some were probably like the UK. Of course no one likes to think of that today
. Like many things in human history we like to whitewash, rewrite, ignore or hide things we do/did when we see them as acceptable later on.