From the Smart City Challenge to saving elephants, Paul G. Allen gave nearly $300 million last year in an effort to tackle some of our world’s greatest challenges. That places Allen fourth on the list of America’s top philanthropists of 2016, according to Chronicle of Philanthropy magazine’s annual ranking of the country’s top 50 givers, “The Philanthropy 50.” Below, explore the various causes Paul cares deeply about, the breadth of his impact and why he’s devoted to solving these global problems.

Follow Paul on Twitter or Facebook to learn more about how he’s working to solve the world’s toughest challenges in 2017.

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Paul G. Allen Named One of America's Top Philanthropists

By The Editors