Organised Gangs in Today's Urban Environment

Since the attempts of the World Trade Center, it does not happen one day that the media tell the exploits of the various organized strips existing in the World. Suffering from an absence of wide definition because of their variety, the notion of organized gangs arouses a serious study. Indeed, resting on a selective, constant and definitive membership, summarized by the formula "blood in, blood out", the disregard of rules workbenches by the strip is punished by the death. Exercising its domination in the street, the gang does not hesitate to use the violence and exercises their criminal activities while arming itself to be respected. This phenomenon, so dangerous and very present at the beginning in North America, tends to extend very quickly in the other countries to affect then a world character. To fight against these strips, the most affected States were brought to react by setting up new methods of fight and by getting organized at the multilateral level. Dividing into two parts, this thesis shows, in a first part, how the presence of organized gangs became a social problem and in a second part, state reactions in the fight against the organized gangs.