According to the Doctors of Thinkology

Dorothy & Co. follow the Buddhist Golden Path or the road to 'the new Jerusalem'

She knew she wasn't in Kansas, but did she know she was in an allegory? She knew she was on a journey, but was it actually an acid trip? What? The Wizard of Oz isn't just another entertaining children's story? No, contends historian Quentin Taylor. "Quite simply," he says, "Oz operates on two levels, one literal and puerile, the other symbolic and political." Others agree, only instead of "political," some would say "religious," "feminist," or "theosophical" (story, videos): http://www.bbc.com/culture/story/20140819-the-wizard-of-oz-hidden-meanings