From 1945 to the end of his life, Maurice Allais, Nobel Prize Laureate in Economics (1988), devoted a large part of his work to the European question. As a staunch Unionist, Allais insisted on the fact that, while the threefold freedom of goods, people and capital was necessary to improve the well-being of individuals, it was also a very ambitious goal. Thus, he argued, it was necessary to promote a European federalism on the basis of a scientific criterion: economic democracy—and via an organized method: competitive planning. However, Allais was aware that political integration had to precede economic integration and that economic efficiency could not be ensured without a single currency. He argued that the introduction of the euro had to be accompanied by real monetary reform (credit system, indexation of future commitments, stock markets, international monetary system) in order to regulate the multiplication of financial crises.