This paper presents one of the first systematic mappings of how Catholic-ecumenic church acts as agent of social transformation to sustainability. We argue that Integral Ecology operates as a paradigm reshaping discourse, organizations, and socio‑political systems through a dual role: 1) an accelerator that orchestrates cross‑scalar networks, equips communities, and translates values into practical repertoires; and 2) a destabilizer that challenges extractive regimes by delegitimizing incumbents, shifting resources, and forming countervailing coalitions. Drawing on more than one hundred documents from Catholic and ecumenical organizations coded in NVivo, complemented with network/timeline visualizations, we show how Integral Ecology has become a polyvalent frame guiding individual formation, organizational change, and socio‑environmental action. It provides a normative horizon and a theory of change, but risks managerial depoliticization unless connected to explicit structural targets and phase‑out strategies for unsustainable socio-economic pathways. REPAM (Pan-Amazonian Ecclesial Network) illustrates how this paradigm shapes practices in the Amazon: as an accelerator, it enables rights‑based leadership, territorial knowledge production, and scaling of niche practices such as agroecology and solidarity economy; as a destabilizer, it supports divestment, litigation, and alliances with Indigenous and peasant actors that unsettle dominant development models. We identify theories of change linking norm entrepreneurship, capability building, niche scaling, and regime delegitimation to meso‑level transformations in governance, networks, pedagogical infrastructures, and resource allocation. We conclude with design principles: anchor normative appeals to time‑bound phase‑outs; build meso‑level infrastructures that translate Integral Ecology into routines; expand experimentation in commons and solidarity economies; and safeguard its transformative distinctiveness.