Reforming the Security Council is a current theme, concerning its composition, as well as the threats it has to face, and its action capacities. Yet, even in the current condition of the Charter, it remains an unrivalled source of international legality and legitimacy. The Council may be, following situation and the support brought by member States, an architect or an instrument. It possesses a normative ad operational flexibility allowing it to adjust to all challenges. Three levels of intervention can be seen : at the minimal level, it takes into account a situation it does not control and may only seek to moderate; at the intermediary level, it organizes and reconstructs after a conflict; at the highest level, it controls international action entirely. – Summary AFRI-2005