One Third of a Nation is a Living Newspaper play produced by the Federal Theatre Project in 1938. Written by Arthur Arent from research by the editorial staff of the Federal Theatre Project, it focused on the problem of housing in the United States and the growth of slums in New York City. The play was produced in New York and in nine additional cities, where it was adapted to specific community conditions. It was adapted as a feature film in 1939, and revived on the New York stage in 2011.