This introduction traces aspects of the history of fiduciary duties in business law and scholarship. Despite fiduciary law’s centrality to business law, the chapter describes how the contractarian revolution of the 1980s contributed to the marginalization of fiduciary duties, both in theory and doctrine. However, subsequent developments, both in case law and in scholarship, have questioned some of the core assumptions of the early wave of contractarian theory. The introduction outlines three critiques that scholars have levied against the early contractarians’ view of fiduciary duties, and connects these critiques to the eighteen chapters in the volume. The introduction also provides a roadmap of our contributors’ arguments.