http://dx.doi.org/10.59704/a01cbb241c04942f https://verfassungsblog.de/a-society-of-trust/ A Society of Trust - Mutual Trust as the Horizontal Institutional Grammar of Interdependence Siegert, Jasper eng 2026-06-29 electronic resource text/html ddc:342 Article 2 TEU Commission v Hungary EU EU Constitutionalism European Society Mutual Trust Principle EU Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 This contribution investigates a still underexplored element of Commission v Hungary. The judgment undoubtedly matters in terms of the enforceability of Article 2 TEU. Yet its significance reaches further. The Court also recalled that the Union’s common values are linked to one of the central mechanisms of EU law: the principle of mutual trust. I submit that mutual trust should not be understood merely as a technical rule of inter-state recognition but as the horizontal institutional grammar of interdependence within European society.