Here is my Goodreads review of 'War, What Is It Good For?' by Ian Morris.
It is an interesting and counter-intuitive piece of historical writing. Morris indicates that casual violence has reduced over history, and that this is because societies become more stable as they become more prosperous, and that they only become more prosperous once they have been subdued - by war. And that this has always happened, and probably always will. A fascinating read. He is not afraid of big ideas, or of uncomfortable ones; and that is always a good thing.