Thanks for sharing those- it does seem like the idea of war is the main thing that has demanded that we grow up, or outgrow play, maybe so that we as a society can more easily be taught the opposite of play; depression.
You shared a quote once, but I don't remember the author, about how creative adults are those who 'survived childhood'. That stuck with me, and I thought of it while I wrote this post, and feel like such a survivor often.