The Trump administration’s stance on anti-personnel landmines worries many—but also speaks to a future in which the rules of war are uncertain. Britain’s universities are coming to grips with how much the slave trade built them. And why the ads on televised sport aren’t always what they seem.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer For information regarding your data privacy, visit acast.com/privacy