Multicultural ideology proposes that group memberships should be not just acknowledged but also valued in order to accommodate diversity and attain equality. In three studies conducted in Spain and Canada we analyzed, using different measures, the relationship between multicultural ideology on the one hand and prejudice, support for social policies, and motivation for social change on the other hand. In Spain we focused on responses to Gitanos (Spanish Roma) and, in Canada, on First Nations people. Results showed that multicultural ideology was related in both cases to lower prejudice and higher support for social policies to support the minority group and motivation for social change. The internal motivation to control prejudice was an important mediator of this relationship in both countries. In contrast, the way in which social identities are represented played a different role as a function of country: whereas a dual identity representation played a mediating role in Canada, a common identity representation was the mediator in Spain. These results support the importance of valuing cultural diversity to harmonize intergroup relations and to reduce inequalities between majorities and minority groups. (C) 2016 Elsevier Ltd. All rights reserved.