Considerable variation has been observed in allomaternal nursing (breast-feeding by individuals other than mothers) behavior across contemporary foraging populations: while relatively common in some populations, it is rare or absent among others. Here the authors examine data on allomaternal nursing from 12 previous studies of foraging societies and utilize a worldwide sample of 104 cultures to assess global variation in allomaternal nursing.

Considerable variation has been observed in allomaternal nursing (breast-feeding by individuals other than mothers) behavior across contemporary foraging populations: while relatively common in some populations, it is rare or absent among others. Here the authors examine data on allomaternal nursing from 12 previous studies of foraging societies and utilize a worldwide sample of 104 cultures to assess global variation in allomaternal nursing.

Considerable variation has been observed in allomaternal nursing (breast-feeding by individuals other than mothers) behavior across contemporary foraging populations: while relatively common in some populations, it is rare or absent among others. Here the authors examine data on allomaternal nursing from 12 previous studies of foraging societies and utilize a worldwide sample of 104 cultures to assess global variation in allomaternal nursing.

Considerable variation has been observed in allomaternal nursing (breast-feeding by individuals other than mothers) behavior across contemporary foraging populations: while relatively common in some populations, it is rare or absent among others. Here the authors examine data on allomaternal nursing from 12 previous studies of foraging societies and utilize a worldwide sample of 104 cultures to assess global variation in allomaternal nursing.

Considerable variation has been observed in allomaternal nursing (breast-feeding by individuals other than mothers) behavior across contemporary foraging populations: while relatively common in some populations, it is rare or absent among others. Here the authors examine data on allomaternal nursing from 12 previous studies of foraging societies and utilize a worldwide sample of 104 cultures to assess global variation in allomaternal nursing.

The social control hypothesis suggests that ritual human sacrifice may have played an important role in the evolution of social stratification, functioning to legitimize class-based power distinctions by pairing displays of ultimate authority with supernatural justifications. Authors test this hypothesis about human sacrifice with a phylogenetic analysis of 93 Austronesian cultures.

The social control hypothesis suggests that ritual human sacrifice may have played an important role in the evolution of social stratification, functioning to legitimize class-based power distinctions by pairing displays of ultimate authority with supernatural justifications. Authors test this hypothesis about human sacrifice with a phylogenetic analysis of 93 Austronesian cultures.

The social control hypothesis suggests that ritual human sacrifice may have played an important role in the evolution of social stratification, functioning to legitimize class-based power distinctions by pairing displays of ultimate authority with supernatural justifications. Authors test this hypothesis about human sacrifice with a phylogenetic analysis of 93 Austronesian cultures.

The social control hypothesis suggests that ritual human sacrifice may have played an important role in the evolution of social stratification, functioning to legitimize class-based power distinctions by pairing displays of ultimate authority with supernatural justifications. Authors test this hypothesis about human sacrifice with a phylogenetic analysis of 93 Austronesian cultures.

The social control hypothesis suggests that ritual human sacrifice may have played an important role in the evolution of social stratification, functioning to legitimize class-based power distinctions by pairing displays of ultimate authority with supernatural justifications. Authors test this hypothesis about human sacrifice with a phylogenetic analysis of 93 Austronesian cultures.