Food insecurity is a persistent challenge in the developing world, particularly the Sub-Saharan African region. Based on the latest report on the state of the World Food Insecurity, an estimate of 28% of the population in the Sub-Saharan Africa is recorded to be malnourished. This enduring challenge, therefore, requires further studies to shed light on the underlying causes of the problem and find a sustainable solution. Previous studies situate causes of food insecurity around four broad theoretical approaches :( 1) food availability decline (FAD), (2) entitlement to food failure, (3) utilization failure and (4) politics and power dynamic approach. This thesis adds its contribution to the last approach which has been attracting academic interests in recent days. Using a case study design, this thesis, therefore, examines why Kenya experiences persistent food insecurity despite the abundance of resources and opportunities for international development aid. The thesis argues that the persistent food insecurity in Kenya is due to horizontal public policy inequalities (HPPIs), which defines resource distribution across ethno-regional territories in Kenya, leading to regional disparities in access to vital public good necessary for realizing food security.