It is strange, indeed, to have devoted one's life to an obscure topic and to sense it suddenly as a focus of political passion. It is also a unique opportunity: when a country like France, so long a victim of protectionism, makes ready to give it a new impetus, when another, the United States, hopefully cured, envisages it as the stock issue of an electoral campaign, it is fitting to search for motivations which preserve world-wide restrictive practices no longer defensible in theory. Thus, a comportment is discovered first found in international trade then invading the most variegated fields and explaining in large measure the rise of the day's great problems: unemployment, the financial crisis and the armament race.