This modern classic by international journalist and military historian Gwynne Dyer is widely acknowledged as one of the most compelling analyses of armed conflict throughout the ages. Dyer traces the growth of organised warfare from the earliest days of humankind, arguing – with neither despair nor false optimism – that war as an act of mass violence has remained unchanged. The only real change has been technological. He suggests that the international system, whereby each polity is responsible for its own defence, encourages war to settle disputes about status and influence. Why is this? Why do men and women fight wars? Is it even possible to tame the impulse? Is this "lethal custom" innate, or culturally determined? How might we change? War is essential reading on the way to resolving these eternal questions.