In Killer High, Peter Andreas tells the story of war from antiquity to the modern age through the lens of six psychoactive drugs: alcohol, tobacco, caffeine, opium, amphetamines, and cocaine. Armed conflict has become progressively more "drugged" with the global spread of these mind-altering substances. From ancient brews and battles to meth and modern warfare, drugs and war have grown up together and become addicted to each other. By looking back not just years and decades but centuries, Andreas reveals that the drugs- conflict nexus is actually an old story, and that powerful states have been its biggest beneficiaries.