A very interesting take on the “real” meaning of the Wonderful Wizard of Oz, by Frank Baum.
Check out this BBC Article from 2014, which explores several other interpretations of the famous children’s book.
The Wizard of Oz: Five Alternative Readings
One reason that “Classics” achieve that status is that they are wide-reaching and timeless. Some of the theories that were applied to the book at the turn of the 19th-20th Century can be applied today – more than 100 years later.