I would have many of us come out of cities. Probably not enough would come out, it would be better if more and more came out. But I mean for there to be simple primitive communities, not driving around to hunt (that is not sustainable!) but growing what they need enough for completely adequate subsistence, with natural farming ways (see Fukuoka) and not using equipment of farmers now. It would need to be where there is good soil and enough water. Other ways will use more resources and impact environments and wildlife far more.