Abstract
The evolution of Habermas follows that of Rawls in Political Liberalism, where the principles of justice are traced back to a historical background and no longer derived from an original position as in A Theory of Justice; and even Rawls, curiously enough, while he made his own the criticism in a broad sense Hegelian, of opponents such as Walzer,continued not to recognize the debt he now owed them. Appropriations of the opponents' objections, withdrawals disguised as victories, ad hoc distinctions and so on, are common staple in disputes between thinkers, phenomena that it would be too easy to dismiss with accusations of tendentiousness or lack of rigour.