Preface; 1. Overview; Part I. An Economic Approach: 2. Dualism as a response to flux and uncertainty Michael J. Piore; 3. The technological foundations of dualism and discontinuity Michael J. Piore; Part II. A Political Approach: 4. The traditional sector in France and Italy Suzanne Berger; 5. Discontinuity in the politics of industrial society Suzanne Berger; Selected bibliography; Index.