Michael Brant Shermer is an American science writer, historian of science, executive director of The Skeptics Society, and founding publisher of Skeptic magazine, a publication focused on investigating pseudoscientific and supernatural claims. The author of over a dozen books, Shermer is known for engaging in debates on pseudoscience and religion in which he emphasizes scientific skepticism.

The Skeptics Society is a nonprofit, member-supported organization devoted to promoting scientific skepticism and resisting the spread of pseudoscience, superstition, and irrational beliefs. The Skeptics Society was co-founded by Michael Shermer and Pat Linse as a Los Angeles-area skeptical group to replace the defunct Southern California Skeptics. After the success of its Skeptic magazine, introduced in early 1992, it became a national and then international organization. Their stated mission "is the investigation of science and pseudoscience controversies, and the promotion of critical thinking."