Career
He has mainly written on the history of the Cold War, Nordic welfare societies, labour movements, Conceptual history, and globalisation.
He has mainly written on the history of the Cold War, Nordic welfare societies, labour movements, Conceptual history, and globalisation.
Professor Kettunen was a board member of the Finnish Literature Society, the Finnish Historical Society (chair 2001-2008), and is currently the editor of the series Studia Fennica Historica.