About the Authors

Isabella Capellini

Isabella.Capellini@durham.ac.uk

Affiliation Department of Anthropology, Durham University, Durham, United Kingdom

Patrick McNamara

Affiliation Department of Neurology, Boston University School of Medicine and Boston VA Healthcare System, Boston, Massachusetts, United States of America

Brian T. Preston

Affiliation Department of Anthropology, Harvard University, Cambridge, Massachusetts, United States of America

Charles L. Nunn

Affiliations Department of Anthropology, Harvard University, Cambridge, Massachusetts, United States of America, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany, Department of Integrative Biology, University of California, Berkeley, California, United States of America

Robert A. Barton

Affiliation Department of Anthropology, Durham University, Durham, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PM CLN RB. Analyzed the data: IC CLN. Wrote the paper: IC PM BTP CLN RB. Helped collect the data: IC PM BTP CLN RB. Analyzed the data: BTP CLN RB.