Quotations of Estabrooks:
"I can hypnotize a man -- without his knowledge or consent -- into committing treason against the United States."

So much for those who say we all have free will. In my opinion, free will, like knowledge and wisdom, is only for those who consciously choose to have it.

"Is hypnosis dangerous? It can be. Under certain circumstances, it is dangerous in the extreme. It has even been known to lead to murder. Given the right combination of hypnotist and subject, hypnosis can be a lethal weapon."

The above points to the danger of choosing to remain ignorant.

"The key to creating an effective spy or assassin rests in splitting a man’s personality, or creating multipersonality, with the aid of hypnotism.... This is not science fiction. ...I have done it."

In my (LGKing) Estabrooks was right. All successful demagogues in all categories, including religionists, made, and are making, use of this knowledge. If good people do nothing, they can, and will, succeed.