It has frequently come under fire over the years. In 1957, the director of Detroit's libraries banned "The Wonderful Wizard of Oz" for having "no value" for children of his day, for supporting "negativism", and for bringing children's minds to a "cowardly level". Professor Russel B. Nye of Michigan State University countered that "if the message of the Oz books—love, kindness, and unselfishness make the world a better place—seems of no value today", then maybe the time is ripe for "reassess a good many other things besides the Detroit library's approved list of children's books".