From the Abstract:
Food insecurity – especially when caused by a rise in food prices – is a threat and impact multiplier for violent conflict. It might not be a direct cause and rarely the only cause, but combined with other factors, for example in the political or economic spheres, it could be the factor that determines whether and when violent conflicts will erupt. Changes in food security, rather than levels of food insecurity, are probably most influential. Food insecurity is neither a necessary nor a sufficient condition for violent conflict. Food price stabilization measures and safety nets are critical instruments to prevent violent conflict. Food assistance can contribute to peacebuilding, restore trust in governments and rebuild social capital.
Please find below a link to a paper on food insecurity and violent conflict.