From the text: Instead of publishing another special issue in John’s honor, this issue is dedicated to his memory. Most of the papers in this special issue were submitted by scholars from around the world to honor John Forbes Nash Jr. In addition, we approached a small number of leading game theorists, mathematicians, economists and others and asked them to answer the question: What did John Nash mean to you? The comments that follow include tributes to his work as well as personal accounts and touching anecdotes.