Group Selection and Kin Selection

@article{Smith1964GroupSA,
  title={Group Selection and Kin Selection},
  author={J. Maynard Smith},
  journal={Nature},
  year={1964},
  volume={201},
  pages={1145-1147}
}
  • J. M. Smith
  • Published 1 March 1964
  • Biology, Economics
  • Nature
WYNNE-EDWARDS1,2 has argued persuasively for the importance of behaviour in regulating the density of animal populations, and has suggested that since such behaviour favours the survival of the group and not of the individual it must have evolved by a process of group selection. It is the purpose of this communication to consider how far this is likely to be true. 

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...

References

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Animal Dispersion in Relation to Social Behaviour.

Wynne-Edwards has written this interesting and important book as a sequel to his earlier (1962) Animal Dispersion in Relation to Social Behaviour. Reviewing it has proven to be a valuable task for

An outline of the dynamics of animal populations.

TLDR
The characteristic of balance is sustained and effective compensatory reaction which maintains populations in being in spite of even violent changes in the environment, and which adjusts their densities in general conformity with prevailing conditions.

The Evolution of Altruistic Behavior