I was thinking how I came up against that wall around the same age, a bit earlier, and went looking for "world" stuff or just anything not English, US based, "western culture" wanting to see anything possible. Anthologies were good or looking by specific country or ethnicity. I would root through any library or bookstore. Encyclopedias too. The indexes of books were super instructive. It took just years for me to have any real handle on the depth of the problems of histories but it was clear from the beginning that A LOT WAS WRONG. I didn't go into that (right now it is better if I listen to him than talk about my own thoughts)
Anyway! I'm so, so proud of Moomin and his excitement about scholarly things. I feel like no matter what he does in life he will have that kind of love of books and knowledge and stories.
He also really loved Gilgamesh so I am going to show him those awesome debates online between Hoe and Plough, Fish and Bird, etc.