A further major influence on the New Age was the Theosophical Society, an occult group co-founded by the Russian Helena Blavatsky in the late 19th century. In her books "Isis Unveiled" (1877) and "The Secret Doctrine" (1888), Blavatsky claimed that her Society was conveying the essence of all world religions, and it thus emphasized a focus on comparative religion. Serving as a partial bridge between Theosophical ideas and those of the New Age was the American esotericist Edgar Cayce, who founded the Association for Research and Enlightenment. Another influence was New Thought, which developed in late nineteenth century New England as a Christian-oriented healing movement before spreading throughout the United States. Another prominent influence was the psychologist Carl Jung.