France, along with West Germany, Italy, the Netherlands, Belgium and Luxembourg, founded the European Economic Community in 1957 through which treaty?

The correct answer is the Treaty of Rome, signed in 1957 by France, West Germany, Italy, the Netherlands, Belgium and Luxembourg, collectively remembered as the 'Inner Six', which formally established the European Economic Community and set in motion the process of creating a common market among its members. Signed on 25 March 1957 and coming into force on 1 January 1958, the treaty aimed to remove trade barriers, establish a customs union, and gradually harmonise economic policy among the six founding states, laying institutional groundwork that would eventually evolve into today's European Union. This is why the Treaty of Rome, rather than any later agreement, is correctly cited as the founding legal instrument of the EEC in 1957. The Treaty of Maastricht is incorrect here because it was signed much later, in 1992, and it created the European Union itself along with the framework for the single currency, representing a deeper stage of integration rather than the original 1957 founding. The Treaty of Lisbon is incorrect because it was signed in 2007 and primarily reformed the institutional structure and decision-making procedures of the already-existing European Union, making it a modernising treaty rather than a founding one. The Treaty of Paris is incorrect in this specific context because although a treaty of that name did exist, it was signed in 1951 and established the earlier European Coal and Steel Community, a related but distinct and narrower predecessor organisation focused only on coal and steel resources rather than the broader common market created in 1957. A frequent exam confusion is conflating the 1951 Treaty of Paris, which founded the ECSC, with the 1957 Treaty of Rome, which founded the EEC, since both involved the same six founding countries and both are foundational stages of European integration.