War has changed, but we have not. From our hunter-gatherer ancestors to the rival nuclear powers of today, whenever resources have been contested, we've gone to battle. Acclaimed historian Gwynne Dyer illuminates our many martial clashes in this brisk account, tracing warfare from prehistory to the world's first cities--and on to the thousand-year "classical age" of combat, which ended when the firearm changed everything. He examines the brief interlude...