MILES HEWSTONE is Emeritus Professor, University of Oxford. He has (co)authored 3 books, edited 25 books, and has published over 250 articles relating to the study of social psychology. He has been awarded the Presidents' Award for Distinguished Contributions to Psychological Knowledge (2001) and the Kurt Lewin Medal for Distinguished Research Achievement (2005). He is a Fellow of the British Academy. WOLFGANG STROEBE has taught social psychology in the United States, Great Britain, Germany, and the Netherlands. He is currently Emeritus Professor, Utrecht University and visiting professor at the University of Groningen. He has authored and co-authored multiple books and numerous scientific articles on social and health psychology. He has received several awards, including an honorary doctorate from the University of Louvain (Belgium), the Tajfel Award for lifelong contributions to European Social Science, and the lifetime achievement award of the German Psychological Association.