Following the Yellow Brick Road: The Real Story Behind ‘The Wizard of Oz’.

(…) a high school history teacher named Henry Littlefield published an article in the journal American Quarterly making the case that this well-known tale, which had been published for the first time in 1900, had been written as a parable on Populism, an influential political reform movement that flourished for a time in the latter part of the 19th century.