There is growing alarm over how drugs empower terrorists, insurgents, militias, and gangs. But by looking back not just years and decades but centuries, Peter Andreas reveals that the drugs-conflict nexus is actually an old story, and that powerful states have been its biggest beneficiaries. In his path-breaking Killer High, Andreas shows how six psychoactive drugs-ranging from old to relatively new, mild to potent, licit to illicit, natural...