Resumen
Social innovation is gaining attention as a perspective that stresses the relevance of transforming social relations to promote sustainable territorial development. This paper adopts the social innovation approach to examine Alternative Food Networks. The main aim of the study is to identify key factors in the emergence and development of social innovation processes that give rise to new organisational formulas among farmers, which contribute to the coordination and efficiency of food supply in Alternative Food Networks. The article provides an original conceptual framework on territorial social innovation (TerriSI), which is empirically tested in a case study in Ibiza (Spain). Through a mixed methods approach, the study analyses the emergence and development of a new agricultural cooperative that involves producers participating in Alternative Food Networks in Ibiza. This is considered a socially innovative initiative since it comprises novel social reconfigurations within the local context. The findings underline key factors of territorial social innovation linked to the particular conditions of territories, triggers, leadership, coordination mechanisms, and the capacity to disseminate innovation through the territory.