Originally Posted by mordwyr

Humans had to **** their siblings to get where we are today. The species wouldn't have propagated with incest. But there came a point along human (de)volution that the gene code became degraded enough that it could no longer support incest without further degradation. Hence, the decree around the time of Moses.

Originally Posted by J.R.R. Tolkien

There is only one bright spot and that is the growing habit of disgruntled men of dynamiting factories and power-stations; I hope that, encouraged now as ‘patriotism’, may remain a habit! But it won’t do any good, if it is not universal.