Daniel Yergin is an American author, energy expert, and economic historian, best known for his work on global energy markets and geopolitics. He is the co-founder of IHS Markit, a global information and analytics company, and has served as a consultant to various governments and organizations. Yergin gained prominence with his Pulitzer Prize-winning book, The Prize: The Epic Quest for Oil, Money, and Power, which explores the history and significance of the oil industry. He is also known for his insights on energy policy and has appeared in numerous media outlets discussing issues related to energy security and climate change.