China's President Xi Jinping delivers a speech at the World Economic Forum on Tuesday in Davos, Switzerland. The global elite have begun a week of earnest debate and Alpine partying in the Swiss ski resort, in a week bookended by two presidential speeches of historic import — Xi's remarks and U.S. President-elect Donald Trump's inaugural address. Fabrice Coffrini/AFP/Getty Images hide caption

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Fabrice Coffrini/AFP/Getty Images

Michael Elliott poses with a group of children during a trip to Segou, Mali. One reason for his optimistic outlook is the dramatic drop in deaths of children under age 5. Courtesy of ONE hide caption

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Courtesy of ONE