The authors, who aim to predict the economic and political changes of the next several decades, expertly analyze the interacting technological and social forces that are bringing about these changes. They discuss the ramifications of the new technologies and show how shifts in demographics will affect historical, political, and economic positions in the world. The authors go on to envisage a scenario where ``megastates'' supersede nation-states. In these megastates, the power of technology increases the population rate through improved health, raises the expectations of the peoples in developing countries, rewards those societies who adapt to it, and causes the collapse of those who stay behind. While foretelling an uneasiness and danger of revolt against accelerating technological breakthroughs, the authors spell out specific ``rules'' that nations caring to survive in the 21st century should follow. A thoughtfully prepared work of futurism; recommended for all libraries.-Ali D. Abdulla, East Carolina Univ., Greenville, N.C.