Nuclear war, holes in the ozone layer, disease, genetic engineering, asteroids and supernovas - any of these may bring human history to an end. But are we in imminent danger of extinction? John Leslie assesses the risks facing the human race and concludes: yes, we probably are. Leslie pays particular attention to the 'doomsday argument'. This argument, arising from the undeniable fact that we are a very young species, substantially increases the likelihood of our extinction.
Introduction, 1. War, Pollution, Disease, 2. Other Dangers, 3. Judging the Risks, 4. Why Prolong Human History? 5. The Domesday Argument, 6. Testing the Argument, 7. Prisoner's Dilemma and Nuclear Revenge, Bibliography, Index of Names, Index of Concepts.