Power is the multiplicity of relationships of strength. For the semiologist, language is always closely linked to power. Eco's theory is that the criticism of power has degenerated because that criticism has become massive. As an example of the misunderstanding Eco recalls the theorists of European terrorism who wanted to strike at the heart of the state. The danger, Eco says, is confusing power and force.
Force is causality.
And causality is reversible. That reversal is called revisionism. On the other hand, to change power is to make a revolution. Compromises are revisionistic. Revolution, however, is the sum total of a long series of revisions, the violent overturn of progressive revisions.