Through ethnography of recent peaceful dissent by Catholic and Protestant activists, life histories, and a reading of a postcolonial archive of contextually grounded liberation theology, I explore the theopolitics of grace that fuels the habits and habitus of Sri Lanka's ecumenical left. Pluralistic and indigenised forms of Christianity emerged in the era of decolonisation and nationalisation and were emboldened by Vatican II. Distinguishing ecumenical Christian pluralism from evangelical Christian expansion in the region, this article historicises Cold War religiosity, drawing out ‘bi-polar’ contrasts of politically left and right forms of Christian grace. In doing so, I situate religious pluralism within the convulsive era of class and ethnic-based insurrections in Sri Lanka. Analysing the ‘catholicity’, civic nationalism, and post-nationalist self-conceptions held by Sri Lanka's Christian left, I argue that the ‘something extra’ of grace can be fruitfully understood as the cultural accretions and theo-political formations that accrue through localised emplacements of global Christianity.