"Ministers and educators challenged it for its 'ungodly' influence and for depicting women in strong leadership roles. They opposed not only children reading it, but adults as well, lest it undermine longstanding gender roles.
In 1957, the director of the Detroit Public Library banned The Wizard of Oz for having 'no value for children of today,' for supporting 'negativism', and for 'bringing children’s minds to a cowardly level.'
In one of the most noted cases of censorship efforts against the book, seven Fundamentalist Christian families in Tennessee opposed the novel’s inclusion in the public school syllabus and filed a lawsuit in 1986 based on the novel’s depiction of benevolent witches and promoting the belief that essential human attributes were 'individually developed rather than God given.'
On the charge of including good witches in the story, they argued that all witches are bad, therefore it is 'theologically impossible' for good witches to exist.
The book has even been used on the political spectrum, with some claiming that it promotes socialist and Marxist values due to its perceived lack of a divine presence."