Zachary Karabell is an author, money manager, commentator, and Head of Global Strategy at Envestnet. He is also president of River Twice Research and River Twice Capital. Educated at Columbia, Oxford, and Harvard, where he received his PhD, Karabell has written eleven previous books. He is a regular commentator on CNBC, MSNBC, and CNN. He writes the weekly "Edgy Optimist" column for Reuters and The Atlantic, and is a contributor to such publications as The Washington Post, The Daily Beast, Time, The Wall Street Journal, The New Republic, The New York Times, and Foreign Policy.