Prepared for the Commission on the Year 2000 of the American Academy of Arts and Sciences by the Hudson Institute, the book peers presciently into the next one-third of a century. The authors' predictions are often surprising but hardly breathtaking. East Germany will still be with us, even more legitimate than today. The population explosion will not have produced disaster but its dangerous potential will be even more explicit. Data-transmission costs will plummet, allowing information storage and retrieval to become a ""runaway revolutionary process."" Japan, Brazil, Mexico and India will be the world's new great powers. World government won't have arrived, but increasingly rational conduct among nations will have diminished the prospect of large-scale war. The authors create a series of hypothetical relationships between powers, posit situations of high and low tension, then develop various scenarios. Kahn's name and hardboiled reputation assure critical attention to the ""framework"" of the book and general interest in its forecasts.