1. Introduction 2. Conceptual Vocabulary and Frame of Interpretation 3. Diagonal Application of Fundamental Rights in Multilayered Polities: A Comparative Overview 4. The Horizontal Application of the EU Rule of Law: Conferral of Sovereign Powers with Their Inherent limits 5. The Apparent Diagonal Application of the EU Rule of Law: Extension of Horizontal Application to the Member States When They Act as the EU's Agents 6. The Genuine Diagonal Application of the EU Rule of Law: Incorporation à l'européenne and the Paradigm of Core Standardswords 7. Stress Test of Diagonalization in the United States: Roe v.

Wade, Dobbs v. Jackson and the Limits of Incorporation 8. Stress Test of Diagonalization in the European Union: The Rebellion of Constitutional 9. Conclusions and Proposals.