Serhii Plokhy is the professor of history at Harvard University and the director of the university’s Ukrainian Research Institute. He is the author of numerous books, most recently, _Lost Kingdom: The Quest for Empire and the Making of the Russian Nation_ and _[Chernobyl: The History of the Nuclear Catastrophe](https://www.hachettebookgroup.com/titles/serhii-plokhy/chernobyl/9781541617094/)_.