This is a brief video introduction to the power of belief through the three books of my trilogy: Why People Believe Weird Things, How We Believe, The Science of Good and Evil, and (pace Douglas Adams) volume 4 of the trilogy, The Mind of the Market. The first volume is on science and pseudoscience and, as the title says, why people believe weird things. Vol. 2, How We Believe, is on why people believe in God (but the publisher didn’t want to call it that so they went with the more generic title on belief). Vol. 3 is on why we are moral, but since the book deals more than with the evolutionary origins of morality, they once again went with the broader title. Vol. 4, then, expands on the theme of belief in the realm of economics, and why people believe weird things about money and why markets seem to have a mind of their own.