The impact of rapid technological advances upon international relations is, first, of very great importance, and, second, quite difficult to comprehend and analyze. This is the implicit lesson of this interesting volume, the result of a joint endeavor of the Council on Foreign Relations, the National Academy of Sciences and the National Academy of Engineering. Some of the contributions on certain technology sectors such as telecommunications and biotechnology are specific in nature, others more conceptual. Bobby Inman's chapter on the impact of technology on East-West relations and C. W. Robinson's on its impact on North-South relations are noteworthy. Richard N. Cooper and Ann L. Hollick provide a thoughtful, sweeping analysis of "International Relations in a Technologically Advanced Future."