A comparative analysis of agroecology network led to a classification based on their conditions of emergence, their structure and governance mechanisms. The study points the strengths and weaknesses of the existing networks at the different scales. It shows that the different agroecology schools are not necessarily well coordinated at each level (national, regional, global) nor across levels for each agroecology school. The activities of a regional agroecology learning alliance should be grounded in strong national networks and endorsed by global networks.