HN produces better book recommendations than any other place I know of. People at HN have recommended such books like Chimpanzee Politics, which are so basic yet eye-opening that everyone would benefit from reading them.
If you would get to recommend a single book for everyone to read, what would it be?
I'm not usually so insulting--but as a father of two, if my 3 year old and 1.5 year old could only read one book, it would have to be "Oh, the places you'll go" by Dr. Suess.
Sorry to stomp on Das Kapital and its ilk, but if you get only one book, I can't imagine a better first message to convey than the endless possibilities inherent in each of us.
The world is your oyster! Even if you're old and have wasted most of what you were given. Especially today, in some of the most amazing times that have ever existed (even if you didn't draw the long straw). Today is SO much better than most of history.