[ WP ] A race of slaves who really are genetically inferior

My Master had ordered me up the mountain to speak to an old slave of his stable on the subject of cavalry tactics. The humans had fought no one but eachother for over 100 years, so not even their wisest generals remembered how to effectively combat the new Endari hordes coming from the north. 
 
 Sendak was a wise old dragon, possibly the oldest of us still alive. He was withered and broken, and it had been years since he was last able to bear a saddle. But, he had carried my Master ’ s grandfather into many battles, so He held an affection for the desiccated old lizard and valued his counsel. 
 
 Sendak greeted me warmly, but wasn ’ t interested in talking about military matters. 
 
 “ Did you know the humans were once our slaves? ” 
 
 I sighed impatiently, since I ’ d heard that before. It was an old wish-fulfillment legend that eager adolescents would repeat to themselves as they bristled against their enslavement, before their petty rebellions were inevitably put down. I was surprised to hear it from someone as respectable as Sentak however, so I kept listening. 
 
 “ We created them to serve us. I was alive when we first began making them. We made them with puny minds and fragile bodies. Ponderous little minds totally incapable of magic or philosophy, no breath, no natural armor of weapons of any kind. 
 
 We did give them able hands though. They were to tend our cattle and mine our mountains. We designed them to reproduce like rodents so that they could be easy to replace. ” 
 
 I fought not to lose patience with Sendak. It was no insight to point out that individual humans were weak. But they ruled the world for a reason. 
 
 The old dragon continued “ But for all our intellect, we miscalculated. We made them better than us in a way we couldn ’ t understand at the time. 
 We could never have known what able hands and a high birth rate together would mean. How could we have? There was never an intelligent race that can produce able warriors as they do. I ’ ve sired 8 kin in my 8,000 years, and have less than 100 living descendants. Even the Endari only create young once or twice a century. 
 
 But, a single man will have sired millions of descendants in my time. Even if only one in ten picks up a bow, and one of us could defeat a thousand of them at a time, we would still be outnumbered by more than a hundred to one. 
 
 We had created our future masters without even knowing it ” 

