By 2050, more than one-quarter of the world’s population will live in Africa — up from about one-sixth today. Even if these projections are slightly off, that fact should serve as a call to action for a continent whose long-term promise is equaled by wide-ranging perils. The numbers come from the latest United Nations report on population trends, which projects …

When North Korea tested an intercontinental ballistic missile this week — what its boy tyrant called a ‘gift to the American bastards’ — the response from the Trump administration was fairly conventional. Secretary of State Rex Tillerson correctly called it an escalation. He announced America’s intention to bring the matter before the UN Security Council. And he assured, “We will …

A taxi company that owns no cars. A media titan that creates no content. A retailer with no stores. A couple of years ago, this was the view of Uber, Facebook and Amazon: growing powerhouses even though they consisted of little more than software engineers and data centers (and, in Amazon’s case, a back room with no storefront). Perhaps the …