Writing from experience
Anyone who has read Gertrude Stein, F. Scott Fitzgerald, Ernest Hemingway, e. e. cummings, Malcolm Cowley, or John Dos Passos can see how they used the experience of living in France, England, and Spain as subject matter.
In much the same way, Paul Theroux, Moritz Thomsen, Maria Thomas, Eileen Drew, Richard Wiley, P.F. Kluge, Bob Shacochis, Norm Rush, Marnie Mueller, Peter Hessler, George Packer, Kathleen Coskran, Mark Brazaitis, Mary-Ann Tirone Smith, Eileen Drew, Chris Conlon, Sandra Meek, Tom Hazuka, Jeanne D’Haem, Joseph Monninger, Leonard Levitt, Margaret Szumowski, Ann Neelon, Roland Merullo, Charles Larson, Susan Rich, Mike Tidwell, Susanna Herrera, Peter Chilson, Geraldine Kennedy, Rob Davidson, and hundreds of other Peace Corps writers have used Africa, the Caribbean, Latin America, Asia, and Eastern Europe in their short stories, novels, poetry, and non-fiction.
While writing about the developing world and emerging democracies, they have broadened the landscape of American readers by introducing new countries and new ideas about other cultures and societies, much the same way that the writers and artists in Paris in the 1920s broadened the view of the world for Americans back home.