If I lived while I was in the cavemen days I would totally be wiped out.
I am not a survival of the fittest category of gal.
I am healthy, active and intelligent. However, our body is pretty weak. For example, air quality is a killer for me. I have just about every indoor air quality product there is on the market. I have a humidifier that pairs with our furnace in the wintertime due to our dry skin. The added moisture in the air quality truly makes the home guess warmer. The oil furnace doesn’t need to be set as high and I don’t get chapped lips, bloody noses or dry skin anymore. I use a dehumidifier with our AC in the summertime. This is to prevent bugs and mold growth in the house. It also helps myself and others not get sick while I was in the summertime or get horrible acne. All year around I rely on an air purification system that is installed in our return ducts. It unlinks smells and dust from the indoor air quality. Even with all these things going, I do get sick from time to time. I have to use sensitive skin lotion, unscented soap, sensodyne toothpaste and I use special detergent for our clothing. I could absolutely entirely cut out in a rash. Can you imagine myself and others in the wild? I don’t guess I could live without Heating and A/C but living without indoor air quality cleaners would be taxing as well. Occasionally as small as dust could truly affect our day to day living.