After World War II, most European countries became affiliated with the United States of America, whether in terms of foreign policy or imposing economic sanctions on violating countries, without there being an independent policy.
Europe has already set its own path in IR and RC, a long time ago.
As far as the European Union (EU) is concerned it has already developed the Common Foreign and Security Policy (CFSP) launched in 1992 by the Maastricht Treaty, aiming to preserve peace and strengthen international security in accordance with the principles of the United Nations Charter. It has also developed the European Neighboorhood Policy (ENP), launched in 2004 and reviewd in 2015. ENP builds on the commitment of the EU and its neighbours to work together on key priority areas, and is based on shared values, the promotion of democracy, rule of law, respect for human rights and social cohesion.
As far as the European states are concerned, they have also developed the Union for the Mediterranean (EfM), an intergovernmental organisation bringing together 43 states that was aunched in 2008 as a direct continuation of Barcelona Process. EfM's goal is to strengthen regional cooperation and dialogue through specific projects and initiatives that address inclusive and sustainable development, stability and integration in the Euro-Mediterranean area.