This thesis examines the political and social dynamics of agribusiness in Thailand. Over the last twenty years agribusiness firms grew in scope and activity as Thailand became the major agricultural exporting country of Southeast Asia. The context of this process is explored in terms of national developmentalism, the political economy of agri-food restructuring and history. The thesis analyses two sectors (dairy and shrimp) which demonstrated substantial productive increases and were accompanied with a high level of agribusiness activity. The experiences of these sectors are compared and contrasted to determine the degree to which they characterise historic moments of capitalist restructuring and development.