AP Photo

The European Union is dying -- not a dramatic or sudden death, but one so slow and steady that we may look across the Atlantic one day soon and realize that the project of European integration that we've taken for granted over the past half-century is no more.

Europe's decline is partly economic. The financial crisis has taken a painful toll on many E.U. members, and high national debts and the uncertain health of the continent's banks may mean more trouble ahead. But these woes pale in comparison with a more serious malady: From London to Berlin to Warsaw, Europe is experiencing a renationalization of political life, with countries clawing back the sovereignty they once willingly sacrificed in pursuit of a collective ideal.