Meet 7 Of History’s Most Notorious Occultists, From Madame Blavatsky To ‘The Evilest Man In The World’

Published October 14, 2025
Updated October 15, 2025

Madame Blavatsky, The Founder Of Theosophy

Born in what’s now Ukraine in 1831, Helena Blavatsky was raised in a Russian Orthodox family. It’s unclear exactly when she became interested in the occult, but by the 1870s, she was sharing her esoteric beliefs with others.

Occultist Helena Blavatsky

Public DomainMadame Blavatsky founded the Theosophical Society, a religious movement purportedly based in ancient wisdom.

Madame Blavatsky had spent years traveling throughout Europe and Asia, but by 1875, she was living in the United States. There, she and her friend Henry Steel Olcott founded the Theosophical Society. This religious movement drew from Hinduism, Buddhism, and European philosophies, and Blavatsky stated in her 1889 book The Key to Theosophy that its aim was to “form a nucleus of the Universal Brotherhood of Humanity, without distinction of race, creed, sex, caste, or color.”

Blavatsky also described Theosophy as “the archaic Wisdom-Religion, the esoteric doctrine once known in every ancient country having claims to civilization.” And in her 1877 book Isis Unveiled she declared that mysticism, not religion, was the key to true spiritual insight.

Founder Of Theosophy

Public DomainMadame Helena Blavatsky in London. 1889.

In 1879, Blavatsky traveled to India and established a headquarters for the Theosophical Society in Madras. The movement became popular in the country, though Blavatsky also faced heavy criticism there for alleged fraud. While she claimed to be telepathic and clairvoyant, not everyone thought she was legitimate.

Regardless of the truth of her claims, Madame Blavatsky’s influence is indubitable. Some scholars have even claimed that all modern occultism can be traced back to her teachings about the “Masters of Ancient Wisdom.”

author
Ainsley Brown
author
Based in St. Paul, Minnesota, Ainsley Brown is an editorial fellow with All That’s Interesting. She graduated with a Bachelor's Degree in journalism and geography from the University of Minnesota in 2025, where she was a research assistant in the Griffin Lab of Dendrochronology. She was previously a staff reporter for The Minnesota Daily, where she covered city news and worked on the investigative desk.
editor
Jaclyn Anglis
editor
Based in Brooklyn, New York, Jaclyn Anglis is the senior managing editor at All That's Interesting, where she has worked since 2019. She holds a Master's degree in journalism from the City University of New York and a dual Bachelor's degree in English writing and history from DePauw University. In a career that spans 11 years, she has also worked with the New York Daily News, Bustle, and Bauer Xcel Media. Her interests include American history, true crime, modern history, and science.
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Brown, Ainsley. "Meet 7 Of History’s Most Notorious Occultists, From Madame Blavatsky To ‘The Evilest Man In The World’." AllThatsInteresting.com, October 14, 2025, https://allthatsinteresting.com/occultists. Accessed October 16, 2025.