I read child molestation in the highest circles of wealth and government bond the agent to the ruling group through ritual and blackmail. Also the old elite, including monarchy tend to marry within their family to keep property, wealth, intelligence, and title within the family lineage, there are a lot of children born deformed both of mind and body. I've seen this done with livestock and pets. Breeding to close to the line not only causes physical deformities but aggressive antisocial behavior. Like rage disorder in dogs...