'The Green Revolution' of the 60s and 70s produced immense gains in food cereal production in the Third World. But there are huge problems in the 'post-revolutionary' era: farmers with small or marginal holdings have benefited less than wealthier farmers; intensive mono-cropping has made production more susceptible to environmental stresses and shocks. Now there is evidence of diminishing returns from intensive and intensively chemical agricultural production. What is needed is a new approach, equally revolutionary, but different in its ideas and style. The authors set out what they mean by...