Contingency and determinism in evolution: Replaying life’s tape

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Abstract
Replaying the tape of life: The evolutionary biologist Stephen Jay Gould once dreamed about replaying the tape of life in order to identify whether evolution is more subject to deterministic or contingent forces. Greater influence of determinism would mean that outcomes are more repeatable and less subject to variations of history. Contingency, on the other hand, suggests that outcomes are contingent on specific events, making them less repeatable. Blount et al. review the numerous studies that have been done since Gould put forward this question, both experimental and observational, and find that many patterns of adaptation are convergent. Nevertheless, there is still much variation with regard to the mechanisms and forms that converge. Science , this issue p. eaam5979
Funding Information
  • National Science Foundation (DEB-1451740)
  • Harvard University
  • Michigan State University
  • BEACON Center for the Study of Evolution in Action

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