Hunter-gatherers live in bands, small social groups numbering fewer than 100 people all related by kinship or marriage. In many cases, the size of the group varies according to seasonal fluctuations in resources. Hunter-gatherers are usually nomadic. However, in some cases, because of the availability of abundant resources, they may be sedentary. They are egalitarian and lack chiefs or other formal authority structures.
Social order is based on consensus.
However, the amount of energy expended in the food quest varies from group to group. They exploit a wide variety of foods, including wild plants, animals, and, in some cases, fish. Their diversified diet is due to seasonal and annual fluctuations in the availability of food resources. Men are usually responsible for hunting and fishing. Women usually gather fruits, nuts, and other vegetable foods.