About the Authors

Michael Gurven

gurven@anth.ucsb.edu

Affiliation Integrative Anthropological Sciences Unit, Department of Anthropology, University of California Santa Barbara, Santa Barbara, California, United States of America

Adrian V. Jaeggi

Affiliations Integrative Anthropological Sciences Unit, Department of Anthropology, University of California Santa Barbara, Santa Barbara, California, United States of America, Sage Center for the Study of the Mind, University of California Santa Barbara, Santa Barbara, California, United States of America

Hillard Kaplan

Affiliation Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America

Daniel Cummings

Affiliation Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Supervised field project: HK MDG. Conceived and designed the experiments: MDG. Performed the experiments: MDG DC. Analyzed the data: MDG AVJ DC. Wrote the paper: MDG AVJ.