Proponents of sustainable agriculture seek deeply rooted social changes, but to advance this agenda requires political credibility and work with diverse partners. Asthe literature on political co-optation makesclear, the tension between conviction andcredibility is persistent and unavoidable; nota problem to be solved so much as a built-incondition of movement politics. Drawing on acase history of California's largestsustainable agriculture organization, astructural assessment is made of the strategicchoices facing movement leaders, organizationaltensions that accompany these choices, andperceived gains and losses. The case historydemonstrates (...) how movement leaders craft middlerange strategies that adapt to politicalcircumstances while retaining attachments tocore values and constituencies. Thesestrategies are ripe with tradeoffs, placingdemands on leaders who must implement them in aspirit that sustains organizational vitalitywhile broadening political and social impact.But they also enlarge the democraticsensibilities of movement leaders, increasingtheir ability to listen, learn, and forgealliances based on shared goals rather thansimilar motives. (shrink)

The discourses of agricultural extension reveal how actors represent their scientific activities and goals. The “transfer of technology” discourse developed with the professional U.S. extension service, reproducing its expert/lay power relations. Agroecology is emerging as a systems approach to preventing agricultural pollution. Its theoreticians argue that agroecology cannot be transferred like technology but must be extended through networks of participatory social learning. In California, hundreds of actors and dozens of institutions have cocreated agroecological partnerships using this alternative extension model. They (...) have developed three alternative extension discourses to represent and explain their activities. Bruno Latour's “circulatory system of science” model provides a superior theoretical framework for interpreting the participation and discourses of diverse actors in this extension practice. (shrink)