[notriddle]

It's almost certainly true that the closer you got to the ancestral environment, the more fulfilling people's lives would be. That's hunter-gatherer society, not serf farming. In the grand scheme of things, brick laying and lumber are still pretty modern. The hypothesis is that, in the ancestral environment, your instincts would actually be working in your favor, so good things would actually feel good, and bad things would feel bad.

Of course, the logistics of undoing the neolithic revolution are mind-boggling. You're supposed to learn to be a hunter-gatherer over a lifetime, not to be thrust into it in the middle of your adult life. If some leader-type tried to abandon complex society right away, it would probably go about as well as the Cultural Revolution went. Lots of people accidentally picking the wrong mushrooms and killing themselves, because their parents never taught them how to tell them apart.