There's also "Lord of the Flies", which came out in 1954, and cemented the idea that young boys -- when removed from the moral guardrails of proper British society -- would become absolute terrors to one another
But when this happened in reality -- when six boys were marooned on a remote island for 15 months -- they all cheerfully banded together and co-operated, including carefully tending for one boy who broke his leg, while it healed: https://www.theguardian.com/books/2020/may/09/the-real-lord-of-the-flies-what-happened-when-six-boys-were-shipwrecked-for-15-months
3/x