Najaf is a sacred city of Iraq and there is something you might find very interesting in it.
Ponder into the picture below.
This isn't any shop but this is the actual place where book vendors leave their book with their theory that book readers will not ever steal any book ana thieves wouldn't ever steal a book.I didn't believe at this before but recently someone I know visited this city and he himself saw this view.
Maybe if everyone have this much trust toward the society, Earth would be a better place to live in.
Take care