Book excerpt: Evangelista provides a new framework for analyzing U.S. and Soviet innovations in weapons technology. In America, development is generated from the bottom up with scientists providing the initial impetus. Soviet weapons innovation occurs from the top down, as soviet leaders react to external forces, particularly American initiatives. With current weapons programs such as the Strategic Defense Initiative, the author sees opportunities for arms control. The United States must recognize that technological innovation is no guarantee of security. The Soviet Union must decide not to match American innovation. ISBN 0-8014-2165-9: $32.95.