About the Authors

Adam Maxwell Sparks

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Supervision, Visualization, Writing – original draft, Writing – review & editing

adspar@fastmail.com

Affiliations Department of Anthropology, University of California Los Angeles, Los Angeles, California, United States of America, Center for Behavior, Evolution and Culture, University of California Los Angeles, Los Angeles, California, United States of America

Daniel M. T. Fessler

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing

Affiliations Department of Anthropology, University of California Los Angeles, Los Angeles, California, United States of America, Center for Behavior, Evolution and Culture, University of California Los Angeles, Los Angeles, California, United States of America, Bedari Kindness Institute, University of California Los Angeles, Los Angeles, California, United States of America

Colin Holbrook

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Writing – review & editing

Affiliations Department of Anthropology, University of California Los Angeles, Los Angeles, California, United States of America, Center for Behavior, Evolution and Culture, University of California Los Angeles, Los Angeles, California, United States of America, Department of Cognitive and Information Sciences, University of California Merced, Merced, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.