Acclaimed historian and military expert Gwynne Dyer tells the story of war from its earliest origins up to the present age of atom bombs and algorithms. Dyer chronicles the advent of warfare in the first cities; the rise of inequality and tyranny as humans multiply; the thousand-year classical era of combat until the firearm and the Thirty Years War, which changed everything. He traces how the brief interlude of limited war before the popular revolutions of the eighteenth century ushered in total war and how the devastation was halted by the shock of Hiroshima. Russia's invasion of Ukraine has punctured the longest stretch of peace between major powers since WWII. In a technologically advanced and hyper-connected world, we humans find ourselves in a most precarious position: under the heightened threats of climate change, nuclear war, and superpower rivalry. Far from another dry military history, The Shortest History of War synthesizes research from multiple fields of study and journalism into a highly readable, fast-paced, and enlightening read for anyone who wants to understand the role of war in the long human story and how we can stop it from dominating our future.