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Although some may aspire for a hierarchy-free world, hierarchies are inevitable and strongly resistant to changes. People may feel motivated to see hierarchical social systems as fair, legitimate, and justified, and endorse system-justifying ideologies, such as social dominance orientation (SDO), contributing to the maintenance and perpetuation of intergroup inequality. Belief in the social system\u2019s fairness and legitimacy should increase acceptance and support for the existing society-based social stratification and status hierarchies, weakening support for collective action towards social change. We tested this idea, with two studies, conducted on members of the general population ( N\u2009=\u2009121) and on members of a disadvantaged group highly mobilized for social change towards intergroup equality ( N\u2009=\u2009154). Results showed that system justification undermines collective action through SDO (full mediation). We discuss the implications of including ideological processes when predicting collective action.<\/jats:p>","DOI":"10.1177\/02134748231221428","type":"journal-article","created":{"date-parts":[[2024,3,8]],"date-time":"2024-03-08T07:15:02Z","timestamp":1709882102000},"page":"187-215","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["\u201cI Have Nothing to Complain About!\u201d: System Justification Tendencies Undermines Collective Action Through Adherence to Hierarchy-Legitimizing Ideologies \/\n                    <i>\u201cNo tengo de qu\u00e9 quejarme\u201d: Las tendencias a la justificaci\u00f3n del sistema debilitan la acci\u00f3n colectiva a trav\u00e9s de la adherencia a ideolog\u00edas que legitiman la jerarqu\u00eda<\/i>"],"prefix":"10.1177","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4779-5328","authenticated-orcid":false,"given":"Catarina L.","family":"Carvalho","sequence":"first","affiliation":[{"name":"Center for Psychology at the University of Porto"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5788-4140","authenticated-orcid":false,"given":"Isabel R.","family":"Pinto","sequence":"additional","affiliation":[{"name":"Center for Psychology at the University of Porto"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1509-6397","authenticated-orcid":false,"given":"Rui","family":"Costa-Lopes","sequence":"additional","affiliation":[{"name":"Institute of Social Sciences -University of Lisbon"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8459-6037","authenticated-orcid":false,"given":"Dar\u00edo","family":"P\u00e1ez","sequence":"additional","affiliation":[{"name":"Faculty of Education and Social Sciences, Andres Bello University"}]}],"member":"179","published-online":{"date-parts":[[2024,2,9]]},"reference":[{"key":"bibr1-02134748231221428","doi-asserted-by":"publisher","DOI":"10.1037\/bul0000256"},{"key":"bibr2-02134748231221428","doi-asserted-by":"publisher","DOI":"10.3167\/cont.2018.060102"},{"key":"bibr3-02134748231221428","doi-asserted-by":"publisher","DOI":"10.1111\/pops.12615"},{"key":"bibr4-02134748231221428","doi-asserted-by":"crossref","unstructured":"Dhont K., Van Hiel A., Hewstone M. 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