This chapter poses what understood by food security delineates the scope of reasons for why it matters and whether there are obligations related to enhancing it. Definitions of food security are far from insignificant wordplay as they carry momentous policy implications. The definition is typically understood to describe four dimensions of food security: availability, access, utilization, and stability. The dimensions are hierarchical. Given the basic rights that food security protects and ethical values to which it contributes, the enhancement of food security can be considered morally necessary. Possible answers to the question include nation-states and affluent individuals which form focus here but also the international community, as well as corporations running the global food markets. The term food security was coined at the World Food Conference in 1974. It means availability at all times of adequate world food supplies of basic foodstuffs to sustain a steady expansion of food consumption and to offset fluctuations in production and prices.