At the height of its popularity in the late nineteenth century, absinthe reigned in the bars, cafés, and restaurants of France and its colonial empire. Yet by the time it was banned in 1915, the famous green fairy had become the green peril, feared for its connection with declining birth rates and its apparent capacity to induce degeneration, madness, and murderous rage in its consumers. As one of history’s most notorious drinks, absinthe has been the subject of myth, scandal, and controversy. The Hour of Absinthe explores how this mythologizing led to the creation and fabrication of a vast modern folklore while key historical events, crucial to understanding the story of absinthe, have been neglected or unreported. Mystique and moralizing both arose from the spirit’s relationship with empire. Some claim that French soldiers were given daily absinthe rations during France’s military conquest of Algeria to protect them against heat, diseases, and contaminated water. In fact, the overenthusiastic adoption of the drink by these soldiers, and subsequently by French settlers, was perceived as a threat to France’s colonial ambitions – an anxiety that migrated into French medicine. Providing keen insight into how local cultural narratives about absinthe shaped what quickly became a global reputation, Nina Studer provides a panoptic view of the French Empire’s influence on absinthe’s spectacular fall from grace.