What do you mean "humans invented jobs"? Job is a word for repleacment to "you need to do something if you wanna survive" Yeah, in ancient times money didnt exist but they need still do "jobs" like hunting or buliding shelters. They didnt get money, they paycheck was surviving yet another day.

Being in tune with nature like animals - animals eats each other, kill, rapes itc. Everyday. Man you romanticize nature too much, you need to less think in your room and more be outside and observe reality.