The “New Thought” movement is actually over 150 years old. That’s the trouble with naming a movement. But this one is not about any particular set of thoughts that were once described as new, it has something to do with pointing your mind in new directions. Things like this used to fascinate me. I can see how, at the time they were developed, they might have seemed like a viable alternative to scientific thought that was just developing and sometimes failing. Since then, it has had to be repackaged and renamed to avoid criticism.
The forgotten name behind much of the thought of New Thought is Phineas Quimby.
Using his ideas of mind over matter, he treated Mary Baker Eddy, who went on to found Christian Science that is still going strong and still publishes the respected news magazine, the Christian Science Monitor. More recently, Norman Vincent Peale used some of the doctrine, mixed with Christianity and the psychology of Freud and Jung.