Political interpretations of The Wonderful Wizard of Oz include treatments of the modern fairy tale (written by L. Frank Baum and first published in 1900) as an allegory or metaphor for the political, economic and social events of America in the 1890s. Scholars have examined four quite different versions of Oz: the novel of 1900, the Broadway play of 1901, the Hollywood film of 1939, and the numerous follow-up Oz novels written after 1900 by Baum and others.