The aim of the essay is to enhance the knowledge of mafias, especially the Calabrian one, which is today the most aggressive and dangerous in Northern Italy, describing it with a practical slant, in its most “realistic” emergence. The inspiration has been given by the contributions presented during the seminar organized by the association “Libera” in Turin, the 7th and the 8th October 2011 (“Libera. Associations, names and numbers against mafias" was born in 1995 with the purpose of involving and supporting all those who are interested in the fight against mafias and organized crime). Tracing, after a year, a complete profile of achieved targets and new challenges, the essay offers many levels of reflection and research, with the support of a normative appendix and of a bibliographic index, both complete and up to the date with the measures of the Minister of Justice Paola Severino Di Benedetto. The volume is integrated by an index of organsand agencies of the European Union, and an index of useful web addresses, which make this text a reliable database and a reference point for those who are interested in the subject.