While the social and communal dimensions of conflict are often studied (wars, class struggle), its interpersonal dimension has rarely been analyzed in the human sciences. And yet, conflict is inherent to human relationships. It is as much one of the "normal" forms of relating to others as harmony or avoidance. And from diverging interests to identitarian defense or even the thirst for power, many factors are involved in it. But although it is normal, even useful, conflict scares us, for once unleashed into the world, it tends to keep going all by itself.