Dr. Mesmer was a German doctor who:
Because his treatments seemed to work, many people began to accept his methods over that of actual doctors and this annoyed them because they believed Mesmer's treatments were faux.
They therefore convinced the King to investigate hypnosis and it was found that the effects were as a result of the placebo effect which meant that the treatment only seemed to work because the patient believed that it did even though it didn't.
In conclusion, Mesmer was not liked by French doctors as they disapproved of his methods.
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