Jean Monnet is poorly known! One who is considered to be the ‘father of Europe’, among others, did not assert himself on this slot until more than 60 years ago at the time of the Schuman Declaration of 9 May 1950. Before, the man had had a number of lives: responsible, at his initiative, for organising the refuelling committees for France and Great Britain during the First World War, he became Deputy Secretary-General of the SDN from 1919 to 1923. It then starts a stage in which he develops his taste for international financial affairs, which is the subject of this book. Investment banker with Blair and Co., founder of a merchant bank, Monnet, Murnane and Co., an unfortunate investor in Giannini’s Bank of America in California during the crisis years, and in 1932 was responsible for organising an international financial consortium to develop China by T.V. Soong, the China Development Finance Corporation (CDFC), with US and French banks. It will never have been so much a trotter, travelling on the big ships between France, Great Britain and the United States, Canada and then China and Japan. Point of Europe united in these activities, which seem to have lasted it in the end. This is why in 1938 he responded to Daladier’s call to buy American aircraft. Another story then starts; that of the Monnet banker has been completed. This book presents original texts from researchers, Gérard Bossuat, Renaud Boulanger, Pierre de Longuemar, Philippe Mioche, Yuichiro Miyashita, who shed light on Jean Monnet’s activities. The difficulty was to access reliable, dispersed sources for a less well-documented period than those that follow. They highlight the complexity and richness of a business banker before the Second World War, concerned about international, financial affairs, but as close as possible to international political circles and involved in the great history of international relations.