Answer:
The success of the European Union can be summed in three key aspects:
- Economic integration: trade does not have any restrictions among members of the European Union, and regulations are a common policy for all countries established in Brussels (the capital of the EU).
- Social integration: the EU promotes social integration by allowing free movement of people among citizen's of the member nations. It also promotes the free movement of labor, and exchange programs for university students.
- Monetary integration: 19 of the 27 countries of the EU share a common currency: the Euro. This is an even more advanced form of economic integration because important aspects such as inflation and interest rates are set by the European Central Bank.