GLOBAL PERSPECTIVES
The Making of a Black Swan
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Nov 1, 2017 | 08:00 GMT

Around 1510, German theologian and reformer Martin Luther, second from the left, sits with his contemporaries. When Luther nailed his Ninety-Five Theses to a church door 500 years ago, he triggered one of the biggest black swan events in history.
(HULTON ARCHIVE/Getty Images)
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