After 20 years, the "green revolution" is generally referred to as a milestone in the international agricultural movement. The introduction of new varieties of wheat and rice, along with fertilizers, pesticides, and mechanized farm equipment has produced a dramatic increase in world food production. This paper assesses the successes of the green revolution in light of its effect upon third world countries. It cautions that the revolutionary gains in agricultural production have not been distributed evenly. This uneven distribution of productivity is discussed in the first chapter, "Productivity Reconsidered." The second chapter, "Beyond the Green Revolution," considers the need for new crop varieties and technologies (including biotechnologies) but argues that tomorrow's innovations must be more consistent with regional agricultural traditions. This approach will help to avoid some of the environmental and social costs associated with the agricultural technologies utilized during the green revolution. The third chapter, "Rediscovering Traditional Agriculture," examines the benefits and limitations of traditional methods of agriculture, indicating that these practices should provide the basis for new practices, rather than be swept aside as archaic. "Toward Appropriate Biotechnology" discusses some of the possible contributions offered by biotechnology as tools for more efficient and sustainable agriculture. The document concludes with a call for additional research in sustainable agriculture productivity. (TW)