A dark and terrible side of this sense of community of interests is the fear of a horrible common destiny which in these days of atomic weapons darkens men's minds all around the globe.
I much prefer working with kids whose life could be completely upended by a reading of a book over a weekend. You give them a book to read - they go home and come back a changed person. And that is so much more interesting and exciting.
My favorite period is World War II, and I'm in the middle of writing my fourth novel set in that era.