In the current discourse field ‘clan crime’, the interpretation scheme, the terminology itself and the treatment of the phenomenon by interior departments, law enforcement and other authorities are controversial. There is an intense debate about issues ranging between overestimating and underestimating the phenomenon, between self-inflicted or ‘imported’ criminality and between zero-tolerance reactions by the constitutional state on the one hand and discrimination against entire population groups on the other. Put simply, there is a conflict between the antagonistic ideas of ‘hard’ and negating interpretations of the phenomenon. The anthology is intended to take a scientifically dominated, differentiated or ‘moderate’ path without ignoring the above-mentioned opposites. The aim is to close previous gaps in knowledge and to correct widespread discursive assumptions. The book is aimed at an interested specialist audience from the criminal and social sciences as well as middle and higher management levels of the police and social work or crime prevention.