The history of science is replete with discoveries that were considered socially, morally, or emotionally dangerous in their time; the Copernican and Darwinian revolutions are the most obvious. What is your dangerous idea? An idea you think about (not necessarily one you originated) that is dangerous not because it is assumed to be false, but because it might be true?

Respondents include many whose work has appeared on Boing Boing before, including: J. Craig Venter, Sherry Turkle, Danny Hillis, Jaron Lanier, Rodney Brooks, David Gelernter, Kevin Kelly, Freeman Dyson, George Dyson, Rudy Rucker, Mihalyi Csikszentmihalyi, Clay Shirky, Ray Kurzweil, and Clifford Pickover.