About the Authors

Rudolf Cesaretti

Rudolf.Cesaretti@asu.edu

Affiliation School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, 85281, United States of America

José Lobo

Affiliation School of Sustainability, Arizona State University, Tempe, Arizona, 85281, United States of America

Luís M. A. Bettencourt

Affiliation Santa Fe Institute, 1399 Hyde Park Rd, Santa Fe, New Mexico, 87501, United States of America

Scott G. Ortman

Affiliations Santa Fe Institute, 1399 Hyde Park Rd, Santa Fe, New Mexico, 87501, United States of America, Department of Anthropology, University of Colorado Boulder, Boulder, Colorado, 80309, United States of America

Michael E. Smith

Affiliation School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, 85281, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: RC JL LMAB. Wrote the paper: RC JL LMAB SO MS. Performed historiographical research: RC. Produced the dataset: RC SO. Developed the model of hierarchically structured social interaction: LMAB. Produced tables and figures: RC LMAB. Wrote the appendices: RC.