Recent high-profile terror attacks pose a new challenge for police and intelligence services. All seem to be the work of lone wolf actors. Yet police and intelligence services, by the nature of their work, target groups. It’s possible to adjust that focus, but that would require Western societies to make an important trade-off. On Monday, a 17-year-old Afghan asylum …

  At some point, everyone knew, Netflix’s subscriber growth in the U.S. had to slow down. The company’s video-streaming service is nearing market saturation among its core demographic — affluent young-to-middle-aged people — meaning further gains will be harder to come by. Still, it was a bit of a shock for investors to learn from Monday’s earnings report that Netflix …

  The unsettling reality of today’s world is that a bad mood can move readily from one country to another, even when events on the ground call for moderation or optimism. Or in the language of financial economics, emotional and ideological contagion is becoming a more important source of systemic risk. The spread of revolutions during the Arab Spring showed …