How can I use my acting ability to increase worldly interdependence in terms of exchanging entertainment and culture with other countries?

It sounds like you want general acting experience, which you can then apply to diplomatic relations. So I'd recommend getting formal training in acting, with perhaps world history, geography, and other basic information about the cultures you hope to connect through your acting.

This is a remarkable question. A unique career aspiration, for which there may not be any "traditional" career path for you to follow. In fact, you're well off the beaten path - but in a good way. I'd suggest you begin early by learning about acting / performing arts formats in multiple countries. I'd also suggest that you consider whether your acting alone can help you achieve your goals, or whether through leadership, you can lead other actors and performing artists to create the kind of cultural exchange you would like to see. Certainly develop your core acting skills - mastery takes a lifetime to achieve. In addition, I would consider finding visionary leaders in acting-based cultural exchange and approaching them to share your passion and excitement. I am sure they would receive your message very kindly.

mstven, using your art to affect positive social change to make the world a better place is a magnificent goal. The world needs people with this vision. Training in your art is as important as educating yourself in world cultures. You can also research theater companies that share your goals. The Living Theater, The San Francisco Mime Troupe, At The Foot of the Mountain Theater Company are just three names that come to mind when I think of socially involved theater. I worked with the Mime Troupe from 1983-1985. The Mime Troupe does not perform standard white face silent mime (as their name might imply), but is a politically involved theater cooperative that uses all the techniques of the Commedia del Arte and street theater to present plays with dialogue, music and song about current events and social issues of importance. This company has been touring the U.S. and abroad for over 50 years. Working with the Mime Troupe allowed me to meet people in this country and abroad who were were working for positive social change in many areas. Once you begin to research theater companies that are interested in making the world a better place (Jordcirkus of Sweden) you will find that there is an entire network of companies out there that can use people with talent and vision. And the great thing about being a theater artist is that if you cannot find an existing theater company that shares your specific vision about how to work for a better world, you can gather some like minded friends and start a new company.