After a long period of human life rely on the natural gift of prey animals and wild plants, gradually they try to produce food by grow crops and domesticate animals. Those efforts is conducted by way of settling or residing in a place. Although not constantly live in a place, the displacement have been made to find new places.
Agriculture in the form fields is done by burning the forest first, then cleaned and sown the seeds of plants. Plants originally grown include beans, cucumbers, tubers, and grains.
Agriculture is done by move routinely according to soil fertility condition. After the previous harvest season, agricultural areas previously abandoned and moved to a new place that is still fertile. The habit of living together in groups to survive, develop into a life of the cooperate communities.
Mutual help is an obligation for every member of society. Cutting down trees in the forest, burning bushes, sowing the seeds, reap the harvest, making pottery, hunting, and fishing, everything is done cooperate.