This article was originally published in Skeptic magazine (US), and in the defunct eSkeptic newsletter at Skeptic.com on Oct 24, 2020. An archived version is available here. (I submitted the piece with a placeholder title. This title was chosen by the editors.)

The skeptical world has lost a towering figure in James Randi, stage magician, lightning rod, and co-founder of the modern skeptical movement. In 1976, Randi joined philosopher Paul Kurtz, astronomer Carl Sagan, psychologist Ray Hyman, science writer Martin Gardner, and other motivated science advocates and critics of fringe claims to establish North America’s first formal skeptical organization, then known as CSICOP—the Committee for the Scientific Investigation of Claims of the Paranormal (now called CSI, the Committee for Skeptical Inquiry).

Randi may be the single most influential person in the history of skepticism from the 1970s through the first decade of the 21st century. His classic book Flim-Flam! is a defining text for scientific skepticism. He pioneered many of skepticism’s investigative techniques, and many of the arguments and attitudes of skeptical activists. While much of the skeptical literature consists of historical sleuthing and critical analysis, Randi was known for his distinct activist approach to confronting paranormal and pseudoscientific claims. His dramatic public exposé of televangelist Peter Popoff remains one of the clearest modern examples of a fringe proponent unmasked by evidence gathered in the field. Most skeptics would describe Randi as a powerful inspiration for their own work, myself included. Read more