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Human Nature

, Volume 25, Issue 1, pp 6–27 | Cite as

The Insectan Apes

  • Bernard Crespi
Article

Abstract

I present evidence that humans have evolved convergently to social insects with regard to a large suite of social, ecological, and reproductive phenotypes. Convergences between humans and social insects include: (1) groups with genetically and environmentally defined structures; (2) extensive divisions of labor; (3) specialization of a relatively restricted set of females for reproduction, with enhanced fertility; (4) extensive extramaternal care; (5) within-group food sharing; (6) generalized diets composed of high-nutrient-density food; (7) solicitous juveniles, but high rates of infanticide; (8) ecological dominance; (9) enhanced colonizing abilities; and (10) collective, cooperative decision-making. Most of these convergent phenotypic adaptations stem from reorganization of key life-history trade-offs due to behavioral, physiological, and life-historical specializations. Despite their extensive socioreproductive overlap with social insects, humans differ with regard to the central aspect of eusociality: reproductive division of labor. This difference may be underpinned by the high energetic costs of producing offspring with large brains.

Keywords

Eusociality Cooperative breeding Social insects Convergence 

Notes

Acknowledgments

I am grateful to L. Betzig, A. Bourke, F. de Ubeda, P. Ellison, S. Frank, E. Hagen, K. Hill, A. Mooers, P. Nepomnaschy, T. Schwander, B. Strassmann, and P. Turke for helpful comments, and to L. Betzig and J. Lancaster for inviting me to contribute this article. I thank the Natural Sciences and Engineering Research Council of Canada for financial support and S. Read for technical assistance.

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© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of Biological SciencesSimon Fraser UniversityBurnabyCanada

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