Question

An international organization created in 1958 to make trade easier among member nations:

Answer 1

The answer is "EEC or European Economic Community".

The EEC was otherwise called the Common Market in the English-speaking nations and sometimes alluded to as the European Community. 
The European Economic Community (EEC) was a provincial association which expected to achieve financial combination among its part states. The European Economic Community (EEC), the most noticeable case of a free trade region, really is the thing that financial experts call a customs union.

Answer 2

European economic community was formed by the European Union we can trace its origins from the European Coal and Steel Community and the European Economic Community formed in 1951 and 1958 respectively by the Inner Six countries of Belgium, France, West Germany, Italy, Luxembourg and the Netherlands. There main purpose of forming the organization is to promote greater social, political and economic harmony among the nations of Western Europe.