[TexasFreeper2009]

The whole concept of nobility and not marrying members of the lower class was in effect what drove the intellectual advances of the modern world.

As we have now abandoned that concept for over 100-150 years we are now reaping the consequences of intermarrying the intelligent with the less intelligent.

[dubyagee]

I could well be mistaken but I think if you look at the genealogy of some of greatest inventors and thinkers (DaVinci, Galileo, etc.) you’ll find that your theory falls flat on its face.