About the Authors

Jordi van Gestel

jordivangestel@gmail.com

Affiliation Theoretical Biology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands

Martin A. Nowak

Affiliation Program for Evolutionary Dynamics, Department of Mathematics, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America

Corina E. Tarnita

Affiliations Harvard Society of Fellows, Harvard University, Cambridge, Massachusetts, United States of America, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JVG MAN CET. Performed the experiments: JVG. Analyzed the data: JVG MAN CET. Contributed reagents/materials/analysis tools: JVG MAN. Wrote the paper: JVG MAN CET.