To bring this point to the extreme, after some time we may have two races of humans, one "higher" race, that would be more intelligent, educated, cultural, and would rule over a much more numbered "lower" race that would be physically stronger, has better mass-reproduction ability, but lower intellect, becoming less and less intelligent over time.

In even more far distant future, those two races may even split so much, that they become separate species, without ability of cross-breeding. Higher species would continue to call themselves humans, and the lower species will quickly drop to the status of animals in the eyes of the higher species.

Then someone will learn that there was once Home Sapiens, which was an ancestors of Home Modernus, and Home Animalis, which is an evolutionary dead end.