Tabla de Contenidos: “…Framing the "opium problem" : protoscientific concepts of addiction -- Creatures of habit : feeding the "junkie monkeys" of Michigan -- "A new deal for the drug addict" : addiction research moves to Lexington, Kentucky -- "The man with the syringe" : pain and pleasure in the experimental situation -- "The tightrope between coercion and seduction" : characterizing the ethos of addiction research at Lexington -- "The great hue and cry" : prison reform and the ethics of human subjects research -- "The behavior is always right" : behavioral pharmacology comes of age -- "The hijacked brain" : reimagining addiction…”