In reality, they do. I have seen as many as three in recent TV commercials for car insurance and they are articulate and witty. Are they merely 60's hippies in modern dress? They also have 60's hairdos and facial hair. Only neanderthals vote for RATs so that's the only way to test them for neanderthalism.
I am quite sure that a self-respecting Neanderthal would never vote for Democrats. Neanderthals weren’t that stupid! It takes years of brainwashing by public schools and MSM and decaying religion to be as stupid as modern folk.
There may have been a climate-change trigger to civilization. North Africa and the Near East used to be moister. As desert conditions set in, the human population was forced to move to the river floodplains, and there they found the idea conditions for sustained agriculture. That is what allowed the population density which made civilation possible. Then we got division of labor, writing, and other key inventions. From then on humans have flourished, and have not required constant climatic conditions. In fact, they have spead to areas with much less than ideal climates. They have traveled to new climates faster than climate has changed!
We have also survived warm periods, and cold periods (like the Little Ice Age). I think that the only thing we cannot survice is Liberalism and its relatives.