Back in the caveman nights it was the strongest who survived.
You had to stay healthy and strong no matter what or you were gone.
No medicine, nice shelter or steady food. Those people were hearty. They just lived off the land and the best 1s got to live. If you did that to people now, we would not do so hot. I would be picked off within a week. For 1, I am totally used to having climate control. I have zone control for our house, then every room is set to a particular temperature program. I get A/C when I toil out, heating when I sleep and quality cooling when I have dinner. I even control the humidity levels in those spaces! However, the main issue for myself and others in the wild would be the air quality. I have a dehumidifier to toil with our A/C. I have a humidifier for our oil furnace. I have an whole-home air purifier and UV lights installed in the Heating and Air Conditioning. Any little air quality unit you can come up with, I have it. I want our indoor air quality to have the right amount of moisture and be clean. That is because our skin dries out or breaks out easily. I also can get sick from dusty air conditions. Can you imagine myself and others as a caveman? I heard the outdoor air quality is absolutely cleaner than inside, however but what about how dry it gets in the Winter and moist in the summer? I would be dead or ready to kill myself without our IAQ equipment.