Agribusiness giants Monsanto, DuPont and Dow are plotting the boldest coup of a global food crop in history. If their requests to allow a massive commercial planting of genetically modified (GM) maize are approved in the next two weeks by the government of outgoing president Felipe Calderón, this parting gift to the gene giants will amount to a knife in the heart of the center of origin and diversity for maize. The consequences will be grave – and global. With the approvals and December planting deadlines looming, social movements and civil society organizations have called for an end to all GM maize in Mexico. Mexico’s Union of Concerned Scientists (UCCS) has called on the Mexican government to stop the processing of any application for open-field release of GM maize in Mexico. ETC Group joins these calls, and appeals to the UN Food and Agriculture Organization (FAO) and to the UN Convention on Biological Diversity (CBD) – intergovernmental bodies mandated to support food security and biodiversity – to take immediate action.