The anthropological view of hunter-gatherer subsistence rests on two questionable assumptions. First is the notion that these peoples are primarily dependent on the hunting of game animals, and second is the assumption that their way of life is generally a precarious and arduous struggle for existence. The necessity to travel long distances, the high frequency of moves, and the maintenance of populations at low densities are also features commonly associated with the hunting and gathering way of life. Hunting has usually been regarded by social scientists as a way of life in which merely keeping alive is so formidable a task that members of such societies lack the leisure time necessary to "build culture." The hunters tend to work more frequently than the women, but their schedule is uneven. Since hunting is an unpredictable business and subject to magical control, hunters sometimes experience a run of bad luck and stop hunting for a month or longer.