In Out of the Mountains, David Kilcullen, one of the world’s leading experts on modern warfare, offers a groundbreaking look ahead at what may happen after the war in Afghanistan ends. It is a book about future conflicts and future cities, about the challenges and opportunities that four powerful megatrends are creating across the planet. And it is about what national governments, cities, communities and businesses can do to prepare for a future in which all aspects of human society-including, but not limited to, conflict, crime and violence-are rapidly changing.