As fault lines widen across world affairs, Canadian Prime Minister Mark Carney used a high-profile speech in Dublin to argue that Ireland and Canada can help steady an increasingly unsettled international order by acting in concert. Carney delivered the message at the inaugural De Chastelain Public Lecture at Trinity College Dublin during the first day of his two-day visit to Ireland. In remarks that ranged widely across economics and security, Mr Carney said the tools of economic integration were now being turned into…