Yeah, everyone knows how strong and smart royalty has historically been. And how aristocrats are always better human specimens than peasants.
All life forms are born, mature, age and die. This includes individuals, families, clans, classes, societies, empires and civilizations. But from the ashes a new phoenix always returns, to start the cycle anew.
When this occurs, which attributes do you think are manifest throughout these continual cycles? To whom do the spoils of victory consistently accrue? Aristocrats are better people than peasants. In fact, that's what the name actually means. The myth of the deserving, noble poor is just that as well - a myth.
Logically, it's easy to de-construct. The victors were/are physically superior. But, they couldn't be meatheads and/or dumb jocks; a certain level of cunning was/is necessary. After victory was achieved, who do you think they took as their reward? The hot village 9/10s or the dogs? In fact, why are so many people able to claim some kind of aristocratic ancestor? It's because for every legitimate child, they were fathering and equal or greater number on the side with their mistress(es).
However, with all this being said, these attributes are all genetically caused. That means they can be isolated, then duplicated, then applied. Gene therapy will be one of the greatest medical achievements of mankind. And to what standards of beauty and intelligence will most aspire?
That's why the potential next great battlefield will be the conflict over whether the "lucky sperm" elites will allow their secret sauce to be duplicated on a mass basis. Consider all advantages rendered mute, with Muzzies at 115 - and by logical extension, discarding said primitive beliefs - with no one left to serve as a slave or serf. Enter robots; but that's a different thread ...