Stephen Mark Kotkin is an American historian, academic, and author. He currently serves as the Kleinheinz Senior Fellow at the Hoover Institution and a senior fellow at the Freeman Spogli Institute for International Studies at Stanford University. Prior to these roles, Kotkin taught at Princeton University for 33 years, where he held the title of John P. Birkelund '52 Professor in History and International Affairs, taking on emeritus status in 2022.