Endogamy's the practice of marrying within a social group, rejecting others based solely on culture as being unsuitable for marriage or other close personal relationships. Cultures that practice endogamy require marriage between specified social groups, classes, or ethnicities. A Danish endogamist, for example, would require that a marriage be only with another Dane. A tendency toward endogamy may be quite commonplace, but globalization's said to counteract this tendency. Several ethnic religi… (More on Endogamy)