exogamic

LeGuin called “Clans, exogamic groups, chiefs or governors, political units... [or just] [t]he germinal, nameless political community that can be traced among the Indians of the greater part of the State [in this case California].”

The Volokh Conspiracy » Debating the Case for Anarchy: 2007

They even have a mathematics for it, with empirical formulas and symbols for "lateral pressures" and "exchange valences" and "exogamic relief."

Time For The Stars Heinlein, Robert A. 1956

If a group is exogamic, the women in it were born abroad somewhere.

Introduction to the Science of Sociology Robert Ezra Park 1926

The clans were exogamic as to their own members, as were also the phratries in primitive times.

Indians of North Carolina: Letter from the Secretary of the Interior, Transmitting, in Response to a Senate Resolution of June 30, 1914, a Report on the Condition and Tribal Rights of the Indians of Robeson and Adjoining Counties of North Carolina O. M. McPherson 1915

However, this exogamic system could not prevent inbreeding, as there was always the possibility that uncles and nieces might marry, so that a "horizontal" system was superimposed across this "vertical" one, forbidding all marriages between different generations.

Two Years with the Natives in the Western Pacific Felix Speiser 1914

The assertion that these smaller bands constituted exogamic clans seems consistent with Plains Indians custom.

The Catholic Encyclopedia, Volume 2: Assizes-Browne 1840-1916 1913

The cause of Ahura's being troubled at the feast is not certain, but the king evidently supposes that she has been pleading to be allowed to marry her beloved brother, and when taxed with it she only expresses her willingness to give way to his exogamic views.

Egyptian Tales, Translated from the Papyri Second series, XVIIIth to XIXth dynasty 1897

The particular exogamic customs vary considerably among early tribes, the differences following, in general, differences of social organization.

Introduction to the History of Religions Handbooks on the History of Religions, Volume IV Crawford Howell Toy 1877

If a group is exogamic, the women in it were born abroad somewhere.

Folkways A Study of the Sociological Importance of Usages, Manners, Customs, Mores, and Morals William Graham Sumner 1875