I read it in school, but honestly did not find it to be all that special. Its a good book, but its message was pretty simple and i think modern audiences would agree with the premise immediately.
I found "The Catcher in the Rye" to be the most thought-provoking of high schools books. However, i dont think it really would improve society if more people read it.
If i could think of a book everyone should read to improve humanity, it would have to be something akin to either statistics for dummies, moral philosophy for dummies, or wealth management for dummies.