Last October, the European Court of Justice struck down the Safe Harbor agreement, a 15-year-old transatlantic arrangement that permitted U.S. companies to transfer data, such as people’s Google-search histories, outside the EU. In invalidating the agreement, the ECJ found that the blurry relationship between private-sector data collection and national security in the United States violates ...

Why It’s Too Late to Decouple In 1999, the columnist Thomas Friedman pronounced the Cold War geopolitical system dead. The world, he wrote, had “gone from a system built around walls to a system increasingly built around networks.” As businesses chased efficiency and profits, maneuvering among great powers was falling away. An era of harmony was at ...