RESUMEN

Analyzing ancient DNA of the central Andes, Ringbauer and colleagues identify a markedly elevated rate of unions of closely related parents after ca. 1000 CE. This change of mating preferences sheds new light on a unique system of social organization based on ancestry ("ayllu") whereby within-group unions were preferred to facilitate sharing of resources.

Asunto(s)

ADN Antiguo/análisis , Endogamia/historia , Endogamia/métodos , Reproducción , Historia Antigua , Historia Medieval , Humanos , América del Sur