The Center for Research on Activity, Development and Learning CRADLE is a hub of academics and practitioners pursuing ground-breaking interventionist research based on cultural-historical activity theory (CHAT) since 1994. Founded by Vygotsky, Leont’ev and Luria, activity theory cuts across disciplinary boundaries. We focus on transformations in collective activity systems, including educational institutions, work organizations, public-sector agencies, communities and social movements – and their coalitions. Our research is driven by the need to build alternative forms of activity aimed at equity and sustainability in local, regional and global scales.