"In the 19th and early 20th century the issue had shifted from religion to nation. You had mixed ethnic populations throughout Europe, and as Europe began to reorganize itself on a national, or a cultural, or an ethnic basis, you had two bloody... World Wars that... undermined the magnificent European civilization of the 19th century... Liberalism was called upon in the aftermath... to enable Europeans to live together in ethnically diverse societies. That was the origin of the European Union... an effort to move beyond nationalism, to a new form of ."