This chapter studies forms of ecumenical and interfaith networks involving Latin American and British organisations (among others), highlighting how their initiatives and interaction¬†generate¬†or¬†participate¬†in efforts to enhance global cooperation.¬†Two questions are addressed in that respect: how can one think of cooperation¬†within¬†situations in which conflict and disagreement thrive and uncertainty regarding the future looms large?¬†What resources can be found within religious traditions that point towards a cooperative future without a pre-established¬†blueprint?¬†They are discussed based on the exploration of cases¬†drawn from comparative research on transnational ecumenical social activism.¬†Cooperation is explored¬†based on ecumenical ideals of¬†communion¬†and¬†collaboration¬†among Christian churches,¬†which¬†has¬†developed¬†over time to¬†incorporate¬†an¬†interfaith¬†dimension¬†and a¬†glocal and cosmopolitan outlook¬†– expanding the ancient Greco-Roman notion of the¬†oikoumene.