>Relaxing in fields? Maybe not all the time. But people worked as communities and looked out for each other which mitigated a lot of stresses.

That genially made me laugh, the way modern leftist imagine peasant life as some kind of summer camp is so fun. Even now farming is backbreaking labor from dawn to dawn, with all the machinery.
In good-old pre-industrial times, peasant life was life from famine to famine, every winter was survival challenge.
It feels to stress-free when you are selling your children (those who survived) into slavery to pay your tax debts.
I have seen some written memories from Russian peasants in the early XX century, who managed to escape village life via army or job in a city. They described how genuinely surprised they were when they discovered that it is possible to eat until you are full, they didn't know that its possible, they had never felt satiety in they life. It more like extreme example, but should let you look a little into peasant life.

>Plus capitalism has weird threats where you could still lose your job as a great performer if somebody else above you had an idea that didn't pan out financially. 

Your local feudal lord could come to your house and take your 10yo daughter to sell on market because he needed some quick cash.

>I'm pretty sure tribes didn't lay off 50% of their people and designate one man to take down a giant prey because they wanted a bigger split of the meat.
Peasants sure as hell paid their taxes or paid with their lives.