Who says that increasing height is to an evolutionary advantage? At 5'4", I can fly coach without my knees stiffening up, which is more often useful to me than being able to reach the top shelf without standing on something.
My knees stiffen up in restaurants, theaters, and many cars. I hate having my feet dangle over the edge of the bed so I'm forced to buy extra long beds. Sometimes I wish I had detachable legs.
As far as I know the only advantage to being tall is in playing basketball and football.
My son may not have inherited my height, but he is lucky enough to have inherited my wife's intelligence. It really is hell being the least intelligent in the house. :(