By 1970, approximately two-thirds of the marriages of those on the tribal rolls were to people who were not, with the result that only 59 percent of … - Ward Churchill

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By 1970, approximately two-thirds of the marriages of those on the tribal rolls were to people who were not, with the result that only 59 percent of births reflected a situation in which both parents registered themselves as possessing any Indian blood at all; U.S. Dept. of Health, Education and Welfare, A Study of Selected Socio-Economic Characteristics of Ethnic Minorities Based on the 1970 Census, Vol. 3: American Indians (Washington, D.C.: U.S. Government Printing Office, 1974) pp. 74, 78. For effects in terms of the "blood quantum" criteria by which native identity is officially defined in the U.S., see Thorton, American Indian Holocaust and Survival, pp. 174-5. The implications are clear: "Set the blood quantum at one-quarter, hold to it as a rigid definition of Indians, let intermarriage proceed as it [has] and eventually Indians will be defined out of existence"; Patricia Nelson Limerick, The Legacy of Conquest; The Unbroken Past of the American West (New York; W.W. Norton, 1987) p. 338.