For Emmanuel Levinas objectivity is intersubjectively constituted. But this intersubjectivity is not, as in Merleau-Ponty, the intercorporeality of perceivers nor, as in Heidegger, the active correlation of practical agents. It has an ethical structure; it is the presence, to each cognitive subject, of others who contest and judge him. But does not the exposure of each cognitive subject to the wants and needs of others result in the constitution of a common practical field, which is not yet the objective world of scientific cognition? For Levinas, the constitution of a world common to all is governed by the practice of justice. Justice begins when above the elf and the other there intervenes a third party, who contests and judges both. But whether this third party is a representative of humanity, or a figure of God, would not his justice be but the name of a higher egoism?