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Famine early warning systems began with support from international donors in the aftermath of the Sahelian famine of the 1970s—though in some ways trace their origins back as far as the Indian Famine Codes of the nineteenth century. Attention to the growing number of people caught in crises characterized by extreme and often protracted levels of food insecurity, malnutrition, and mortality is increasing. The information systems that track these conditions and inform humanitarian decision-making have…