Considering that conflicts and crises irrupting within a State posed threats to international peace and security, the Security Council has progressively been brought to intervene in increasing number of crisis situations, especially starting from the 1990s. Yet, faced with these conflicts, the reunion of certain intervention criteria is not enough to provoke the seizing of the Security Council : each situation is assessed individually. The pragmatic approach also prevails when dealing with the means of action of the Security Council : they have been elaborated according to the challenges required by each situation, that is why it is impossible to bring out a rigid and fixed action tenant. Studying the varied interventions of the Security Council unveils a vast range of actions that is nevertheless incomplete and whose efficiency remains irregular. In order to make up for the deficiencies of the Security Council, a certain number of improvements, such as an early warning system, can be considered. – Summary AFRI-2005