The principles of the modern foundational economy and its role in renewing citizenship and informing public policy are explored for the first time in this instructive collection. Challenging mainstream social and economic thinking, it shows how foundational economy experiments at different scales can foster radical social innovation through collective, rather than private, consumption. An interdisciplinary group of respected European academics provide case studies of initiatives and interventions around policy cornerstones including housing, food supply and water and waste management. They build a judicious evidence base of the growing relevance of foundational economic thinking and its potential to provide a new political and social outlook on civil society and social justice.