This article sheds light on the root causes of terrorism by assessing the effect of food security on domestic terrorism among developing countries. Food security is a fundamental physiological need and captures a core well-being outcome. We argue that food insecurity creates grievances among citizens and increases demand among them for action against the government. Terrorist organisations provide the opportunity for citizens to channel their grievances against the government by resolving collective action problems and mobilising citizens. We demonstrate the link between food insecurity and domestic terrorism through quantitative analyses on a sample of 70 developing countries from 1980 to 2011. Our findings demonstrate the deleterious effects of food insecurity on peace in the developing world.