Shortly after her death in 1958, Humphrey's book, The Art of Making Dances, in which she shared her observations and theories on dance and composition, was published. In the introduction she observed that ballet had changed radically in the 20th century. "Suddenly the dance," she said, "the Sleeping Beauty, so long reclining in her dainty bed, had risen up with a devouring desire." She believed in emotions and movement moving "from the inside out", but she also believed in working abstractly where specific events and characters were not illustrated in a way that made sense. For example, "she believed that the concept of democracy was more convincingly conveyed by a fugue uniting four different themes than by a woman in red, white and blue".