Sumário:Complicating the debate: The design of environmental constitutional provisions. Challenges for a rights-based perspective -- Taking constitutional design seriously: Why entrenchment is controversial : polycentricity and disagreement. Responding to controversy : the contrajudicative model as an alternative to judicial self-restraint -- Implications for constitutional theory: A new research agenda for social values constitutionalism. Constitutionally obligatory legislation as a source of constitutional legal norms : reading up. The role of courts in the contrajudicative model.