Baum held different jobs, moved a lot, and was exposed to many people, so the inspiration for the story could have been taken from many different aspects of his life. In the introduction to the story, Baum writes that "it aspires to being a modernized fairy tale, in which the wonderment and joy are retained and the heart-aches and nightmares are left out." This is one of the explanations that he gives for the inspiration for "The Wonderful Wizard of Oz". Baum, a former salesman of china, wrote in chapter 20 about china that had sprung to life.