The European Coal and Steel Community (ECSC) was a European organization created after World War II to integrate Europe's coal and steel industries into a single common market based on the principle of supranationalism which would be governed by the creation of a High Authority made up of appointed representatives from the member states who would not represent their national interest, but would take and make decisions in the general interests of the Community as a whole. It was formally established in 1951 by the Treaty of Paris, signed by Belgium, France, Italy, Luxembourg, the Netherlands, and West Germany and was generally seen as the first step in the process of European integration following the end of the Second World War in Europe. The organization is a spiritual predecessor to the contemporary European Union (EU) as its subsequent enlargement of both members and duties ultimately led to the creation of the EU.
The ECSC was first proposed via the Schuman Declaration by French foreign minister Robert Schuman on 9 May 1950 (commemorated in the EU as Europe Day), the day after the fifth anniversary of the end of World War II, to prevent another war between France and Germany. He declared "the solidarity in production" from pooling "coal and steel production" would make war between the two "not only unthinkable but materially impossible". The Treaty created a common market among member states that stipulated free movement of goods (without customs duties or taxes) and prohibited states from introducing unfair competitive or discriminatory practices.