!-- E IBYL --> The European Union claims it has secured peace among historical enemies, spread democracy to its neighbours and created a new model of international co-operation. But none of that was pre-ordained. The milestones of the past 50 years tell a story of bitter national rivalries, personality clashes and tortured compromises which have threatened the project's survival more than once and may do so again in the coming years. Churchill saw European unity as a means of breaking the cycle of conflict Winston Churchill, Britain's wartime leader, called postwar Europe "a rubble heap, a charnel-house, a breeding-ground...