At the conference held from 25 to 28 March 1987 in Rome to mark the 30th anniversary of the signing of the Treaties establishing the European Economic Community (EEC) and the European Atomic Energy Community (EAEC or Euratom), Pierre Uri, former Head of the Economic Affairs Division of the High Authority of the European Coal and Steel Community (ECSC), outlines the geopolitical context of the Euratom plan and recalls the fears of Jean Monnet with regard to the possible interference between the negotiations on the Common Market and the Atomic Community.