It's become quite common in Europe. The last statistics I saw a few months ago said that a greater percentage of European children grow up to adulthood in a stable home with their biological parents than American children, even though a much smaller percentage of those parents are married than American parents.
Something similar is happening in Quebec, Canada. Avoiding marriages and living in common-law partnerships (usually monogamous) seems to be a popular trend with the younger generation. At least compared to the rest of Canada/U.S., not sure how it fares in comparison with Europe.
Just look at the people who make up Congress. They're pounding their tiny fists and throwing temper tantrums, saying, "No no! I won't let you raise taxes/cut spending/increase the debt limit (pick any one or all three of those and you've described virtually the entire Capitol Building), and I don't care if it destroys the global economy and makes the Great Depression look like a bad day at the beach, because I can't think that far in advance."
Do you get the same impression when listening to Ron Paul? (Speaking for myself, he is the only Republican I ever wished to win a presidential campaign.)
I wish I had the reference for this quote, which I got from a newspaper or magazine earlier this year: (...)
Maybe from this Wahsington Post piece?
(about inbreeding)
Still, it was less common in our species than in our closest relatives.
Was it, really? Or is it just a projection of the current state of affairs back in time to a period for which we lack evidence... I don't know, haven't read much about it, was just wondering...
A primatologist once said that inbreeding is so intensive in gorillas that if you showed a skull from two individuals from opposite ends of the species's range to a biologist unfamiliar with gorillas, he would insist that they must be from two different species.
So, the inbreeding influences the skull shape? I know that it leads (more often than in outbreeding, but still in a small percentage of cases) to all sorts of genetic abnormalities.
There are still a few Paleolithic and Neolithic tribes left in central-northeastern Asia. These people are living the way their ancestors did twelve thousand years ago.
(...)
People also use "polygamy" to include polyandry which, AFAIK, is only practiced among tribes who still live a paleolithic or neolithic lifestyle.
Here's one community that still practices polyandry: the Tibetans of the Niyma. However, their lifestyle seems to be rather modern.