Some people feel that humans have evolved over millions of years to do well in hunter-gatherer tribes and we have not genetically adapted yet in 6,000? years of civilization. If we think returning some habits of hunter-gatherer tribes would be beneficial, then we need to know what they are/were and not just wild-ass guess based on the Nobel Savage myth.
It's worth adding that there were still some nomadic traits, initially. They'd plant and move on, hunting as they went, and would come back to where they planted when it was time to harvest. The speculation that I'm familiar with suggests that they did this with naturally growing crops before they began to cultivate them.
I was thinking that the beginning of writing as the start of civilization, but the start of agriculture could work. With a bit more thought, the beginning of cities (greater than, say, 10,000 people) might be a better one.
Right, its good to present a model of what their habits were, if that was your area of interest. To use them as a prescriptive guide to base your habits on, requires further explanation and reasoning.
