Abstract:Play is a suite of apparently non‐functional, pleasurable behaviours observed in human and non‐human animals. Although the phenomenon has been studied extensively, no adaptationist behavioural theory of how play evolved can be supported by the available evidence. However, the advancement of the extended evolutionary synthesis and developments in systems biology offer alternative avenues for non‐adaptationist physiological hypotheses. I therefore propose a hypothesis of play, based upon a complex ACh activity t… Show more
The peer review history is available in the Supporting Information section of this article (https://doi.org/10.1113/ JP284432#support-information-section).
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