R. Moncayo, Guillermo Keywords: Argentina | Chile | Borders | Delimitation | Holy See | Beagle Channel | Alternative dispute resolution | Mots clefs: Argentine | Chili | Frontières | Délimitation | Saint-Siège | Canal de Beagle | Médiation | ABSTRACT Guillermo Moncayo, Professor at the University of Buenos Aires, reminds us of a series of events towards the end of 1978 that led to such a serious situation that a war between Argentinia and Chile seemed inevitable. The intervention of the Holy See succeeded however in preventing the conf…