The emergence of humans: The coevolution of intelligence and longevity with intergenerational transfers

  title={The emergence of humans: The coevolution of intelligence and longevity with intergenerational transfers},
  author={Hillard S. Kaplan and Arthur J. Robson},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  pages={10221 - 10226}
  • H. Kaplan, A. Robson
  • Published 16 July 2002
  • Biology, Psychology
  • Proceedings of the National Academy of Sciences of the United States of America
Two striking differences between humans and our closest living relatives, chimpanzees and gorillas, are the size of our brains (larger by a factor of three or four) and our life span (longer by a factor of about two). Our thesis is that these two distinctive features of humans are products of coevolutionary selection. The large human brain is an investment with initial costs and later rewards, which coevolved with increased energy allocations to survival. Not only does this theory help explain… 

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