The house that Jack built: Twitter’s founder departs

Jack Dorsey’s departure from the social-media giant reflects the growing primacy of engineering talent, and the waning mythology of the big-tech founder. Ukraine’s military has become much better at battling Russian-backed separatists since the annexation of Crimea—but now a far graver kind of war looms. And the Economist Intelligence Unit’s latest list of the world’s most expensive cities.

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