The Left is defined by the idea of equality. Although this is the basis of all modern politics, modern Right and Left have different interpretations of equality, which refer to a different moral kernel of it. This moral content is shown by the distinction between «abtreating persons equally» and «abtreating persons as equal». Treating as equal is different from treating equally when, in order to respect the equal dignity of persons, simple equality becomes unjust. The Left preserves its identity if it thinks that moral content as an idea of absence of domination, not only apparent, but also latent, mediated by opaque social relations.