About the Authors

Aaron Clauset

aaron.clauset@colorado.edu

Affiliations Department of Computer Science, University of Colorado, Boulder, Colorado, United States of America, BioFrontiers Institute, University of Colorado, Boulder, Colorado, United States of America, Santa Fe Institute, Santa Fe, New Mexico, United States of America

Kristian Skrede Gleditsch

Affiliations Department of Government, University of Essex, Wivenhoe Park, Colchester, United Kingdom, Centre for the Study of Civil War, Oslo, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AC KSG. Performed the experiments: AC KSG. Analyzed the data: AC KSG. Contributed reagents/materials/analysis tools: AC KSG. Wrote the paper: AC KSG.