Back to Resource Library Toward a theory of the evolution of fair play Schank, J.C., Burghardt, G.M., Pellis, S.M. · 2010 ★ NIFPlay Rating: 7 Rating Scale 10 Rigorous play-specific science 6–9 General biological science 5 Sound play research (uncontrolled) 1–4 Less rigorous / indirect 0 Indirect but high value Schank, Burghardt, and Pellis present a computational and comparative approach to understanding how fair play — the rule-governed equity of play — evolved across species. View Resource