Social agreements, roughly put, are a focused and actual variant of social contracts. They are focused on the agreement of parties to co-operate and they pertain to basic aspects of living and living together; however, not comprehensively but focused on a specific theme or themes such as sanitation, water supply or energy provisions. Unlike hypothetical social contracts, social agreements can be empirically studied. So what is their implication for hypothetical social contract, and beyond that for justice and sustainability? This paper introduces social agreement via a case study of social agreement in watershed development in an arid zone with low-income farmers. Watershed development in this context seeks to restore degraded land and simultaneously local democratic institutions. It is an ecological and social investment with medium-term and long-term benefits, i.e. for both present and future generations. Social agreement makes us rethink some issues in the theory and practice of justice and sustainability: how we frame the relation of generations in intergenerational saving, how we think about stability beyond the nation state, and how agreement is a dynamic process that creates the space for the capabilities required to support it in a just and sustainable way. On the global level, social agreement is a possibility for the affluent to discharge their responsibility via investments in such agreements.
Key words: social agreement, social contract, justice, sustainability, social innovation.
