|THE DEVELOPMENT OF POLITICAL INSTITUTIONS.|
THE general law, that like units exposed to like forces tend to integrate, was in the last chapter exemplified by the formation of social groups. The clustering of men who are similar in kind, when similarly subject to hostile actions from without, and similarly reacting against them, we saw to be the first step in social evolution. Here the correlative general law, that in proportion as the like units of an aggregate are exposed to unlike forces they tend to form differentiated parts of the aggregate, has to be observed in its application to such groups, as the second step in social evolution.
The primary political differentiation originates from the primary family differentiation. Men and women being, by the unlikenesses of their functions in life, exposed to unlike influences, begin from the first to assume unlike positions in the social group as they do in the family group: very early they respectively form the two political classes of rulers and ruled. And, how truly such dissimilarity of social positions as arises between them is caused by dissimilarity in their relations to surrounding actions, we shall see, on observing that the one is small or great according as the other is small or great. When treating of the status of women, it was pointed out that to a considerable degree among the Chippewas, and to a still greater degree among the Clatsops and Chinooks, "who live upon fish and roots, which the women are equally expert with the men in procuring, the former have a rank and influence very rarely found among Indians." We saw also that in Cueba, where the women join the men in war, "fighting by their side," their position is much higher than usual among rude peo-