The history of New Thought started in the 1830s, with roots in the United States and England. As a spiritual movement with roots in metaphysical beliefs, New Thought has helped guide a variety of social changes throughout the 19th, 20th, and into the 21st centuries. Psychologist and philosopher William James labelled New Thought "the religion of healthy-mindedness" in his study on religion and science, The Varieties of Religious Experience.