After World War II, Europe began a process of peaceful political unification unprecedented there and unmatched anywhere else. But the project began to go wrong in the early 1990s, when western European leaders started moving too quickly toward a flawed monetary union. Now, as Europe faces a still-unresolved debt crisis, its drive toward unification has stalled -- and unless fear or foresight gets it going again, the union could slide toward irrelevance.

Germany seems like Europe’s lone island of fiscal stability, but trouble lurks under its impressive export-fueled growth. An obsession with debt and austerity has blocked domestic investment as the country has ignored problems such as a shrinking work force and outdated infrastructure. Germany needs to borrow and spend more or face the end of its economic miracle.