What are the main values of the European Union?

The European Union has its own important functions and values. Countries, which are the members of the EU, have different rights and opportunities. For example, the European Union citizen can move freely and be in any member state of the European Union. Also there is the opportunity to work in another country of the European Union. Educational institutions work together. Students can study in another EU country. Common rules bring stability and security to Europe. Peoples living conditions are tried to improve. Actually, everybody wants to live where he or she really wishes. And I think, if our country is not the member of EU, there is no need to change it.