I think this is an excellent question. Since Homo sapiens became farmers (previously hunter-gatherers) we have worked increasingly long hours. Instead of hunting and gathering for 5 hours a day we are up before the sun, work all day, and get home after the sun goes down, mostly. All because we want more and more material things in our lives rather than be content with the simple lives our ancestors lived. If you’re interested in this concept you should check out a book called Sapiens and maybe take a read of this post from a while ago. Thanks for commenting @analystza
https://steemit.com/life/@galenkp/how-wheat-domesticated-humans-a-tale-of-tragedy-and-poor-nutrition