James M. Buchanan, winner of the Nobel Prize in Economics in 1986, was a pioneer of public choice and constitutional political economy, as well as contributing to many fields of study, including philosophy, political science, and public finance. Each chapter in this volume seeks to explore, critique, and emphasize the continuing relevance of the vast contributions of Buchanan to our understanding of political economy and social philosophy. The diversity in topics and approaches will make the volume of interest to readers in a variety of fields, and accessible to scholars from a variety of backgrounds providing the opportunity to further a cross-disciplinary exploration and discussion on market process theory.