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Review
. 2020 Sep;35(9):834-847.
doi: 10.1016/j.tree.2020.05.003. Epub 2020 May 27.

Multilevel Organisation of Animal Sociality

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Review

Multilevel Organisation of Animal Sociality

Cyril C Grueter et al. Trends Ecol Evol. 2020 Sep.

Abstract

Multilevel societies (MLSs), stable nuclear social units within a larger collective encompassing multiple nested social levels, occur in several mammalian lineages. Their architectural complexity and size impose specific demands on their members requiring adaptive solutions in multiple domains. The functional significance of MLSs lies in their members being equipped to reap the benefits of multiple group sizes. Here, we propose a unifying terminology and operational definition of MLS. To identify new avenues for integrative research, we synthesise current literature on the selective pressures underlying the evolution of MLSs and their implications for cognition, intersexual conflict, and sexual selection. Mapping the drivers and consequences of MLS provides a reference point for the social evolution of many taxa, including our own species.

Keywords: multilevel society; social complexity; socioecology.

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