Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Countries seeking membership in the EU must undergo a great deal of reform, for example the reforms seen in Turkey, such as the abolition of capital punishment. The emergence of the Union's global influence, and the draw of membership, has been the subject of a number of academic writings. Mark Leonard describes the area of EU influence as the "Eurosphere".
Countries within the Eurosphere
An Euler diagram showing the relationships between various multinational European organisations and agreements
According to Mark Leonard, the Eurosphere includes 109 countries. In Europe, this includes the 27 member states of the EU, applicant countries wishing to join the EU, the Western Balkans and European Commonwealth of Independent States countries (including Armenia, Belarus, Georgia, Moldova, Ukraine and transcontinental Kazakhstan). He does not mention Western European countries such as Norway who are already integrated into the EU's single market. Outside of Europe, he lists every African country and every Middle Eastern country, as well as the countries forming the eastern border of the Eurosphere such as Iran, Azerbaijan and Russia.