Darie Cristea has a Ph.D. in Sociology, lector at the Faculty of Sociology and Social Work, University of Bucharest and scientific researcher gr. III of the Sociology Institute of Political Sciences of the International Relations (Romanian Academy). He is also project coordinator at Inscop Research. Author and coauthor of numerous volumes and articles, scientific and also destined for the larger public. At the University of Bucharest he teaches Sociology of Politics, Methods and Techniques in Sociology Research and The Methodology of Security studies. His latest book is A Century of International Relations (2013).