There are two kinds of division of labor: that based on age and that based on . Division of labor by age results in the obvious biological fact that human beings 62 three major periods of development. In childhood, the human is in large part dependent upon s for food, shelter, and other 63 ; he has neither the strength nor the skills to for himself. Children, in most societies, have only light tasks as helpers 65 s or none at all, and when duties are 66 , these are often regarded as educational, to prepare the child for his 67 . hood is ordinarily the period of greatest vigor and ability. The man or woman 68 on full responsibility for the duties of his/her and special occupation. In many societies, in particular those 69 the technology requires physical strength and stamina, the in the prime of life 70 a dominant role and is often assigned the more responsible position in the group. Old age, since it inevitably brings 71 a loss in muscular vigor and a decline in sight, hearing and coordination, again results in a change in occupational status. This does not necessarily mean that the old lose 72 ; many societies make full use of their older members’ experience and wisdom and employ them to direct the efforts of the more vigorous 73 no-so-experienced s. division of labor is more difficult to 74 for in strictly biological terms. A careful survey of the division of labor by lends little support to the often-repeated 75 that women are 76 only for occupations that require relatively little skill or intelce. In recent years women, freed from economic 77 to men, have shown themselves fully 78 in nearly all professions in which they have been given the opportunity to participate. Man’s wider range of occupation and the fact 79 he very often occupies the more important positions of leadership in human societies, is probably 80 due to his allegedly superior intelce than to his greater from the biological function of childbirth and the necessarily 81 duties in the care of infant.