I don't understand your first question... I think this[1] would be your definitive resources but if you can just search for "evolution of play" then you'll fin

I don't understand your first question... I think this[1] would be your definitive resources but if you can just search for "evolution of play" then you'll find a lot of stuff. Wikipedia has a hodgepodge of perspectives in section on the purpose of play [2] but you might be better off tracking down those citations. 1. https://www.cambridge.org/core/books/abs/cambridge-handbook-of-play/evolution-of-play/9EAFEDC059FB72E575809219BDB444E0 https://www.cambridge.org/core/books/abs/cambridge-handbook-... 2. https://en.wikipedia.org/wiki/Play_(activity)#Development_and_learning https://en.wikipedia.org/wiki/Play_(activity)#Development_an...