This study aims to explain the relationship between religious soft power, social capital, and the endogenous progress model in the discourse of sacred defense. The research is qualitative in terms of approach and method, based on content analysis using the logic of critical discourse analysis. Data were collected from selected documents and texts, including statements by Imam Khomeini (RA), wills of martyrs, and the document of the Islamic-Iranian model of progress, and then coded and categorized. The findings showed that religious soft power in the discourse of sacred defense is constructed through themes such as theological duty-oriented, acceptance of guardianship, Ashura representation, and resistance identity. This semantic system leads to trust based on faith brotherhood, the norm of sacrifice, voluntary participation, and national cohesion at the social level, and at the institutional level, it creates implications such as jihadi management, popularization of governance, justice-oriented, and scientific-technological resilience for the endogenous progress model. Accordingly, the results of the research show that there is an internal and multi-level relationship between religious soft power, social capital, and endogenous progress. The innovation of the research is in reinterpreting the Sacred Defense as a semantic-social-institutional device for understanding the indigenous capacities for progress in the Islamic Republic of Iran.