This Liber Amicorum honors James F. Rill's extraordinary career, his professional accomplishments, and his exceptional and lasting influence on the development of national and international antitrust law and policy. This selection of 21 essays, written by Jim's friends, current and former colleagues, academics and other prominent practitioners, provides insightful, analytical and thoughtful reflections on an array of current and historical topics in antitrust law. Together, they also reflect Jim Rill's life in antitrust: his illustrious career as an antitrust practitioner, his successful tenure as Assistant Attorney General for Antitrust within the US Department of Justice and his ground-breaking work as Co-Chair of the International Competition Policy Advisory Committee (ICPAC), culminating in the creation of the International Competition Network (ICN). As testified by this compilation of articles, Jim's keen interest in the law, his dedication to the principles of international cooperation, convergence, and due process in antitrust, and his genuine interest in and affection for the people who are part of the antitrust community have made an enduring impact in the field of competition law and will continue to do so for many decades.