'We will show our strength!': the independentists' support for group-based hierarchy to guarantee and legitimate ingroup status-enhancement ('¡Mostraremos nuestra fuerza!': el apoyo de los independentistas a la jerarquía basada en el grupo para garantizar y legitimar la mejora del estatus del endogrupo)

We propose that support for group-based hierarchy among members of low-status or subordinate groups may be boosted by beliefs in future ingroup high status. Specifically, the more individuals believe their group may hold a higher status, the more they support hierarchical intergroup relations (i.e., high social dominance orientation; SDO), by boosting ingroup favouritism. In turn, SDO should be positively associated with collective action tendencies by increasing social competition intentions. Using samples from Catalonia (N = 152) and the Basque Country (N = 262), results showed that independence supporters' beliefs in future ingroup status enhancement reinforced participants' SDO, through nationalist sentiments (i.e., ingroup bias) but not through patriotism in the Catalan sample, and directly in the Basque sample. In turn, SDO increased collective actions towards independence by reinforcing individuals' motivation to compete with the opponent dominant outgroup (Madrid region), especially in the Catalan sample. We discuss the implications of considering situational and contextual factors to better understand individuals' support for group-based hierarchies and inequality.