The ‘Experts: Past, Present, Future’ blog is a collaboration between the International Social Science Council (ISSC), IASS Potsdam and the Material Cultures of Energy project at Birkbeck College, University of London. The blog posts deal with expertise and experts in a variety of political, social and economic areas and arenas from the 19th century to the present, and from multi-disciplinary perspectives. Our aim is to foster exchange between historians, social scientists and policy experts. After a first series of articles to be posted between April and June 2017, the blog will be open to new original contributions as well. Please contact lizzie@worldsocialscience.org for more information, and find out more about the publication partners at: www.worldsocialscience.org (for ISSC) ; www.iass-potsdam.de/en (IASS) and www.bbk.ac.uk/mce/ (Material Cultures of Energy).