But everyone was still sub-average by "normal" standards. You mean that everyone was sub-average by todays normal standards. But what was normal in the year 1

But everyone was still sub-average by "normal" standards. You mean that everyone was sub-average by todays normal standards. But what was normal in the year 1435 is very different from what is normal in the year 2011, and again very different from what the norm will be in the year 2505. Had Trevor and Carol been able to produce offspring, they (and the rest of their class) might have been able to bolster the norm. Alas, Trevor tragically met his demise with a heart attack whilst masturbating to produce sperm to artificially inseminate her. Meanwhile, Clevon kept cleaving on, appreciably moving the needle on what 'norm' means. Edit: We didn't get to see much inside of the Brawndo corporation, where all of the power was concentrated, so we can't be sure that President Camacho was the brightest around. All we got to see was the CEO, who may not have been the brightest bulb in the drawer. The descendants of the medical researchers bent on curing hair-loss and prolonging erections probably work in the bowels of that - or some other - corporation.