Barbarians at the gate usually don’t bring down once-successful civilizations. Nor does climate change. Even mass epidemics like the plague that decimated sixth-century Byzantium do not necessarily destroy a culture.
Far more dangerous are institutionalized corruption, a lack of transparency and creeping neglect of existing laws. All the German euros in the world will not save Greece if Greeks continue to dodge taxes, featherbed government and see corruption as a business model.
Even obeying so-called minor laws counts. It is no coincidence that a country where drivers routinely flout traffic laws and throw trash out the window is also a country that cooks its books and lies to its creditors. Everything from littering to speeding seems negotiable in Athens in a way not true of Munich, Zurich or London.
Mexico is a much naturally richer country than Greece. It is blessed with oil, precious minerals, fertile soils, long coastlines and warm weather. Hundreds of thousands of Mexican citizens should not be voting with their feet to reject their homeland for the U.S.