International crimes are the gravest crimes we know. International crimes – under which are classified genocide, crimes against humanity and war crimes – entail murder, rape, looting, destruction, and in general the uprooting of families and entire societies. The study of these crimes is not without its own peculiarities and obstacles. The purpose of this book is to discuss the methodological and statistical particularities from a non-technical, conceptual point of view. The book has been written as a textbook for a Master’s course ‘International Crimes and Criminology’.