I think the distinction lies in the fact that "play" activities are done for their own sake. This is an essential part of the experience of "being" (IMO) as it

I think the distinction lies in the fact that "play" activities are done for their own sake. This is an essential part of the experience of "being" (IMO) as it entails performing activities simply because one enjoys them. Compare this to "work" in the sense of a problem that needs to be solved with the application of human resources as standing-reserve. I agree that the concept of "humanity" is constantly evolving. I think the ways in which society will change in order to reflect this evolution in humanity are super interesting to explore.