This chapter examines the nineteen case studies of community-based organizations (CBOs) across multiple sectors that demonstrate how collective action can be organized to prioritize socio-ecological concerns. Each section contrasts problematic arrangements in dominant sectors—characterized by profit-maximizing surplus generation—with functioning community-based alternatives. The cases span land and food systems, energy and finance, healthcare and education, housing and mobility, and intentional communities. Despite diverse contexts and operational scales, these organizations share common characteristics: they create spaces where stakeholders can voice experiences and influence decision-making; they maintain low barriers to participation; and they effectively organize economic activities around meeting basic needs.