The Bellagio Group was founded by Fritz Machlup, William Fellner and Robert Triffin at a time of global economic crisis not unlike the one we face today. With its original network of thirty-two economists, it was the forerunner of the current Group of Thirty. The Bellagio Group comprised academics, policy makers, bankers and corporate leaders, who worked together with the aim of economic reform. Machlup, Fellner and Triffin led the Group in their attempts to identify the connecting principles between geopolitical, currency, business and social issues facing economies in the aftermath of the Second World War. Between 1964 and 1977 the Bellagio Group were instrumental in bringing together academics with leaders from the public and private sectors in a series of influential conferences. These meetings involved the most important economists in the world and focused on banking practices, as well as mechanisms to increase economic growth. This collection brings together the private correspondence and published papers of the Bellagio Group’s founders to create a vivid picture of the personalities, issues, debates and compromises that led to the adoption of flexible exchange rates and a modified Triffin plan. The first three volumes are each devoted to the letters and unpublished papers of Machlup, Triffin and Fellner. The final two volumes focus on the conferences and publications of the Bellagio Group founders.