This comprehensive Research Handbook provides an unparalleled overview of contemporary private law theory. Featuring original contributions by leading experts in the field, its extensive examinations of the core areas of contracts, property and torts are complemented by an exploration of a breadth of topics that cross the divide between private and public law, including labor law and corporate law. Beginning with a nuanced consideration of the ways in which the private/public distinction has been defined and discussed over time, the Research Handbook investigates and compares differing viewpoints on the concept of private law. Chapters explore key issues in the theory of private law from legal, economic, philosophical, political, feminist, historical and sociological perspectives, utilising a rich diversity of methodological approaches. The contributors also offer a variety of views on the future of private law and private theory. The Research Handbook on Private Law Theory will be an essential resource for legal thinkers, in particular scholars and graduate students working in any area of private law. Its varied perspectives on the subject will also be of interest to philosophers, political scientists, economists and sociologists.