Neither the intervention of humanity, nor the right or duty to interfere, nor humanitarian intervention humanitarian intervention, have received the assent of the states to which they are directed. The fear is that it could become a loophole into which its proponents could rush to achieve their hidden agenda. All these reasons prompted the international community to adopt a new approach in order to achieve a broader consensus on the question of intervention against sovereign states. The result is what is now known as the "responsibility to protect". This new concept seems to be calming everyone's ardor, even if the problem is still not entirely resolved. At least, not according to the first experiences of the practice of this new concept of the responsibility to protect. The first part of this book traces this process of mutation, while the second analyses the first steps of this new concept.