are assumed to be unique, unprecedented interventions designed for the specific context of the Troubles. Yet they are part of a much broader and historically deeper trend: the European liberal(ising) peace project, which emerged from World War I and World War II and evolved as part of the (post-) Cold War reconstruction framework. The first, in the 1960s, took place through programmes and rhetoric of Prime Minister Terence O'Neill, who fused the Brooke government's ambitious post-partition statebuilding plans with the liberal polity-building project, both normatively and structurally. The PEACE programmes, this article argues, constituted the second attempt to extend this version of peace-as-polity-building into Northern Ireland, albeit in a much more overt, intentional and comprehensive manner.