Six presentations followed by discussions. Contents: Introduction par P. DUCREY; H.VAN WEES, -Stasis, Destroyer of Men. Mass, Elite, Political Violence and Security in Archaic Greece-; W.RIESS, -Private Violence and State Control. The Prosecution of Homicide an its Symbolic Meanings in Fourth-Century BC Athens-; A. CHANIOTIS, -Policing the Hellenistic Countryside. Realities and Ideologies-; C. BRELAZ, -Ladieu aux armes: La defense de la cite grecque dans l'empire romain pacifie-; A. W. LINTOTT, -How High a Priority did Public Order and Public Security have under the Republic?-;R. MacMULLEN, -The Problem of Fanaticism-; Y. RIVIERE, -L'Italie, les iles et le continent: Recherches sur l'exil et l'administration du territoire imperial (Ier-IIIe siecles); Epilogue par C. BRELAZ et P. DUCREY.