Susan Powter (born 22 December 1957) is an Australian-born motivational speaker, nutritionist, personal trainer and author, who rose to fame in the 1990s with her catchphrase "Stop the Insanity!" She hosted her own talk show The Susan Powter Show in the 1990s.
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“There are two great unknown forces to-day, electricity and woman, but men can reckon much better on electricity than they can on woman.”
—Josephine K. Henry, U.S. suffragist. As quoted in History of Woman Suffrage, vol. 4, ch. 15, by Susan B. Anthony and Ida Husted Harper (1902)