From this primitive indifference they may have advanced , some to endogamy , some to exogamy .
从这种原始的漠不关心中，它们可能取得了发展，有的走向内婚制，有的走向外婚制。
It may be noted , however , that endogamy appears in populations formed by the fusion of many tribes , as the almost uniform characteristic of the dominant race .
Hereafter we shall see how a tribe organized on the principle of endogamy might be developed from one organized on the principle of exogamy , in perfect consistency with the law against the intermarriage of relations .
Caste identity has been sustained and reproduced by caste endogamy , and so are the caste hierarchical values . That 's why caste is not the same as ethnicity , though the latter might hint the direction that the former will evolve .
