Agroecology, as a practical tool and as a scientific approach, addresses through its three dimensions (ecologicalproductive, socioeconomic and politicalcultural) the various forms of transition to more sustainable agrifood systems, from the farm to the forms of organization of consumption and public policies The complex and transdisciplinary perspective are an essential part of Agroecology as a way to face the problems of the agrarian sector, the rural environment and the consumption of healthy foods The understanding of ecological processes and the role of traditional and modern forms of sustainable agriculture, together with the understanding of the social and political processes of the organization of agrifood systems