This could be the next envelope push!

[Christians4LessGvt]

This may be the next push of envelope allowing people to marry their kids...
Grandpa marrying granddaughter and you will be a bigot unless you approve!   

http://www.telegraph.co.uk/women/family/disgusted-by-incest-genetic-sexual-attraction-is-real-and-on-the/

[Xavier_Onassis]

You had to go all the way to the UK to drag this in. If you knew some other language, you could drag it in from so many other places.

Mountain gorillas are seriously incestuous, I have heard, I imagine that humans were as well back before we came down from the trees and out of the caves. The taboo against incest stems from genetic diseases that are multiplied when close relatives have children. Like the hemophilia among the descendants of Queen Victoria.  ^There were a lot osd first cousin marriages among the ruling houses of the UK, Germany, Denmark, Russia and Austro-Hungary.

I don;t see this as becoming any serious problem.
There will always be a certain small amount of incest. The difference will be that there will be less hiding it in the future.

[Plane]

....... The taboo against incest stems from genetic diseases that are multiplied when close relatives have children.. ...

How was such a useful taboo developed earlier than Gregor Mendel (20 July 1822 – 6 January 1884)?

[Xavier_Onassis]

The Greeks had strong taboos against incest, as did many societies long before Mendel.
Violating the taboo resulted in a curse on the family or the tribe. They knew nothing of genetics, but they did observe the results of too much inbreeding.

[kimba1]

Im not saying incest is already part of american culture but some regions of America has aleays been alittle laxed in things and have bern accused of being genetically compromised

[Xavier_Onassis]

How was such a useful taboo developed earlier than Gregor Mendel (20 July 1822 – 6 January 1884)?
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This happened in many societies, but not in all of them.\

The Pharoahs  in Egypt were often the children of brother-sister marriages. Cleopatra Ptolomeus  was the eleventh generation descendant of Alexander the Great's general Ptolemy.  Hawaiian royalty was also incestuous. This was common in much of Polynesia. So long as there is not a  serious genetic defect in the bloodline, this is not necessarily an unhealthy thing.

If you check the bloodlines of AKC winning dogs and racehorses, you will find a LOT of incest.

As I recall, incest was not permitted as readily to the non royal members of these societies.

Upon occasion, the king's heirs were not really the genetic descendants of the king. In one of Goya's famous paintings, the princes and princesses looked far more like Prime Minister Godoy than they did like the king, Carlos IV. The king, they say loved the portrait, So did the queen, who looks like a harpy.

I am not in favor of incest, but making it a taboo as well as making it compulsory are both  worse than ideal.