Nicholas Kristof is a two-time Pulitzer Prize winner whose op-ed columns appear twice a week in The New York Times. He is co-author, with his wife, Sheryl WuDunn, of five best-selling books, including Tightrope in 2020 and the No. 1 bestseller Half the Sky. He joined The Times in 1984 and won his first Pulitzer as a foreign correspondent based in China, and his second for his columns from Darfur. He also has been editor of Sunday editions of The Times and has more than 2.5 million followers on social media. He has lived on four continents, traveled to 160 countries, and survived unpleasant encounters with mobs, malaria, and an African airplane crash. He is a member of the Aspen Strategy Group.