Introduction. HUMAN THREATS: Mass Extinction; Global Pandemic; The Doomsday Machine; Mutually Assured Destruction; Terrorism; Death by Euphoria; Overpopulation; Population Death Spiral. TECH: Cyberwar; Biotech Disaster; Nanotech Disaster; Artificial Superintelligence. ENVIRONMENT: Transhumanism; Death of the Bees; Invasive Species; Desert Earth; Global Food Crisis; Water Wars; Resource Depletion; Environmental Collapse; Rising Sea Levels; The Gulf Stream Shuts Down; Snowball Earth; Chemical Pollution; Ozone Destruction; Asteroid Impact; Mega Tsunami; Supervolcano; Oxygen Depletion; Geomagnetic Reversal; Superstorms. SPACE: Sun Storms; Polar Shift; Lethal Space Dust; Runaway Black Hole; Gamma Rays from Space; Vacuum Decay; Solar Collision; Scientists Create a Black Hole; Hostile Extraterrestrials; Death of the Sun; Galactic Collision; The End of Time; Strangelets. GENETICS: Genetic Superhumans; Dysgenics; Organic Cell Disintegration. THE FUTURE: It's All a Dream; Information Extinction; Unknown Unknowns. Index. Acknowledgements.