Tribes, as opposed to bands, are characterized by a superior mode of production and a superior warrior organization, along with the development of a crucial new social organization, the clan. The superior mode of production includes rudimentary horticulture, or small scale gardening by women, and more successful herd-hunting by the men. There are great variations in the tribal mode of production, depending on the kind of gardening possible in a given area and the kind of game available in a given area. Nonetheless, some superiority in mode of production over bands does occur among tribes, and this produces a marked increase in population.