How Can English Help Me in My Future Occupation?

I want to be historian and international officer in the future. Korea has about five thousand years of history. For this reason, it has brilliant and miserable history at the same time. Due to this long history, it has many cultural treasures. However, a lot of cultural treasures are located in foreign countires. So my final dream is to study and research for getting back Korean cultural treasures and work for UNESCO(United Nations Educational, Scienfic and Cultural Organization). For this reason, it's important that I study English so that I can communicate my ideas of getting back cultural treasures in international society. Also that's why I come to study here.