We propose the Critical Diversity Literacy (CDL) framework for citizenship education in contemporary heterogeneous societies. It encourages an anti-essentialist, power-conscious awareness of difference beyond notions of citizenship that have been constitutive of the nation and tend to normalise masculinity, patriarchy, heterosexuality, able-bodiedness and whiteness. Using intersectionality and decoloniality heuristics, we approach multicultural citizenship from the multiple axes of our identities as we inhabit the world more complexly than mere belonging to the nation-state. The framework synthesises insights from contemporary social theory into a usable scaffolding for diversity capacitation. The ten principles focus on intersectionality, social identities and positioning, historical awareness, diversity vocabulary, the coded nature of hegemonic power and personal engagement. Taken together, they promote an approach to multicultural citizenship that focuses on social justice and pushes us to recognise the lived experience of citizenship 'from below'. The framework has proved useful in designing curricula and interventions in different contexts and sectors and can be utilised to develop age-appropriate materials in schools.