Based on primary research and fifty interviews, this article analyzes the history, institutions, and politics of agricultural policy formulation in Brazil from 1964 to 1992. It focuses on how trade, credit, and support-price policy evolved in response to economic crisis and democratization in the 1980s. Although the economic crisis caused policy to be redesigned, the change in political regime and in the institutions of interest-group representation significantly influenced the direction of policy reform. The return to a democratic regime permitted the Congress and the Brazilian judiciary to play more significant roles in shaping agricultural policy. Simultaneously, democratization led to the questioning of corporatist institutions and the emergence of more participatory organizations in the agricultural sector. These changes have caused policy making to become increasingly subject to explicit rules, which should lead to more predictable policies and a long-term reduction in discrimination against Brazilian agriculture.