I know parents all tend to notice that children think as they grow up they are the first to experience things, and in the next breath take–for–granted inventions that are the common currency of modern living. We have all done it and we all continue to do it but there must have been a first time for everything and like the euphoria the man who first derived pure oxygen and breathed it in knowing he was the first human ever to do so, there are lost moments in time we can only suppose might have happened.
Like the first person ever to wrap their feet in protection and suddenly not feeling the ground too hot or the rocks too sharp. Or the first person to tie their hair back or the hair of someone else. Maybe the first person who managed to turn some plant into paste and find that covering their hair or body stopped the gnats biting.
I know you probably thought for a moment I was going to mention the invention of anti-toxins against snake bites or the invention of the magnifying glass, but actually it is the absolutely normal that is the most important invention. The things that have been with us for thousands of years have moulded our thinking so much we forget they are inventions.