America’s first presidential debate was unmitigated chaos, revealing little more than the rancour between the candidates. In Chicago a newish musical genre called drill has a strong relation to the city’s gang violence; we ask whether it is a causal one. And amid a global rise in hand-washing, we look at the fascinating, fragrant history of soap.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
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