Local Community Development (LCD) is the expansion, perfection and transformation of the economy in a given social, ecological or environmental subsystem of a particular locality or territory. It foments economic, social and cultural links that generate community identity, providing the people, families and organizations of the area with a sense of belonging to a living, organized and integrated collectivity. The concept and theory of SSE arise from the experience and knowledge of a number of small and medium economic organizations which unite based on links of families, neighbourhoods, communities and cooperatives, reciprocal and mutual aid. Economic rationality is manifested in them, which has the active presence of solidarity in production, distribution, consumption and accumulation. LCD coincides and converges with the objectives of an ESS, manifested as the practical deployment of solidarity rationality in the production, distribution and consumption activities in a locality.