Christine Lagarde has been Managing Director of the International Monetary Fund since July 2011. She held various ministerial positions within the French government, including Finance and Economy Minister (2007–11), Minister for Foreign Trade, and Minister for Agriculture and Fisheries. She was also Chairman of the Global Executive Committee and Global Strategic Committee of Baker & McKenzie.

Michael Lewis is the author of many best sellers, including The Big Short and Boomerang, both set in the global financial crisis, and Liar’s Poker, a Wall Street story based partly on his experience as a Salomon Brothers bond salesman. His next book, The Undoing Project—about the Nobel Prize-winning collaboration of Daniel Kahneman and Amos Tversky on how the human mind works—is due out in December. Mr. Lewis is also a columnist for Bloomberg News and a contributing writer to Vanity Fair.