In July 1951, the bimonthly bulletin Actualités industrielles lorraines, published by the Centre d’Information des Industries Lorraines, analyses the repercussions of the Treaty establishing the European Coal and Steel Community (ECSC) on France’s steel and coal industries.

On 31 March 1951, the leader of the West German Social Democratic Party, Kurt Schumacher, harshly criticises the Schuman Plan and outlines the risks being taken by the Federal Republic of Germany.

In 1951, the press officer at the Dutch Embassy in Paris drafts a note on the reactions of the general public and the French press to the challenges of the Schuman Plan.

On 3 February 1951, the Netherlands mission in Germany draws up a note which sets out the attitudes of the general public and the West German press towards the negotiations under way in Paris on the Schuman Plan.

On 3 February 1951, the Dutch Embassy in Rome drafts a note on the reactions of the Italian general public to the Schuman Plan.

On 28 April 1951, in an address given at the Johann Wolfgang Goethe University in Frankfurt, Walter Hallstein, State Secretary at the German Foreign Office, gives details of the numerous economic, political and institutional implications of the Schuman Plan.

In 1951, Albert R. Métral, Chairman of the Mechanical Engineering and Metallurgists Association, considers the principles and the basic rules laid down by the Treaty establishing the European Coal and Steel Community (ECSC) and calls for the French Parliament to reject the text.

On 22 June 1951, during the intergovernmental negotiations regarding the establishment of a European Coal and Steel Community, the German newspaper Süddeutsche Zeitung lists the economic and social problems that the Six will have to face.

In October 1951, the Socialist parties of the Member States of the European Coal and Steel Community send a questionnaire to their respective governments on the economic and social objectives of the new Community.