In 2005, US Marines killed 24 unarmed Iraqi civilians in the town of Haditha, including several children. How should we assess the perpetrators of this and other war crimes? Is it unfair to blame the Marines because they were subject to situational pressures such as combat stress (and had lost one of their own in combat)? Or should they be held responsible for their actions, since they intentionally chose to kill civilians? In this book, Matthew...