Originally known under many names – such as Mental Science, Divine Science, Spiritual Science, Religious Science, Christian Science, Unity, Mind Cure, Science of Being, Home of Truth – the popular American self-help psychology known as New Thought began to spread during the 1870s and had secured a mass audience by the end of the century. The term “New Thought” itself was introduced in the 1890s and was eventually adopted by its main organizational body, the International New Thought Alliance (IN…