“Your minds are full of all kinds of treacherous plans,” wrote Indian activist Tarabai Shinde, addressing men in an 1882 pamphlet. One plan: “Let’s bluff this moneylender and pocket a thousand rupees from him.” Another: “That woman Y, what a coquette she really is! What airs she gives herself! Must corner her one of these days and see whether some affair with her can be managed.” Such “insidious perfidies,” she concluded, “never enter a woman’s mind.”

In the winter of 1878, Friedrich Nietzsche diagnosed himself with “Baselophobia.” After slipping on black ice, developing constant headaches and a finger infection, and suffering a nine-day stretch of persistent vomiting, he had become convinced the city of Basel was killing him. His sister, Elisabeth, blamed his illness instead on his attempt “to imitate Diogenes” by practicing dietary asceticism.

The Communist Party of China considered “revolution in mind” a prerequisite for political emancipation in the 1940s. Work reports tell of “speaking bitterness” sessions—in which peasants would share stories of their oppression—sometimes referred to as “turn-over-mind meetings.” The meetups later served as inspiration for feminist consciousness-raising groups in the United States during the 1970s.

Having gained fame in England as a mind reader, Maud Lancaster came to New York City to perform in 1893. Nellie Bly, investigating for the New York World, quickly discovered that Lancaster’s telepathy act involved a confederate giving secret signals. Bly donned a blindfold, performed the signature trick herself, and published a front-page exposé about the events under a headline reading “Miss Lancaster, Who Astonished All London, Finds the World  ’s Young Woman Too Much for Her.”