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This book provides a follow-up for Van den Ban and Hawkins’ classic Agricultural Extension (1988, 1996), of which some 35 000 copies have been printed in 10 languages1. It does so in several ways.

First, the book attemps to catch up with recent thinking about the relationship between communication and change. The origins of Van den Ban and Hawkins’ book can be traced back to the 1970s, which was the period in which the first (Dutch) edition of the book was compiled (Van den Ban, 1974). Since then, the practice and theory of extension and development communication have changed fundamentally. Although many efforts were made to incorporate new ideas into later editions, we feel that it is now time for a totally new book as we can no longer do justice to the changes in extension thinking by merely adding to or adapting a pre-existing text. In this new book we have maintained and adapted those insights …