This article investigates post-revolutionary Iran's contemporary society, cross-border security, and counterterrorism efforts in confronting international terrorism. Employing a descriptive-analytical method, the study reviews library documents, such as books, academic articles, and official reports, to provide a comprehensive understanding of Iran's progress and challenges since the 1979 revolution. The article delves into the multifaceted aspects of Iran's domestic and foreign policies, its commitment to social justice and economic development, and the growing needs of its youth population. Furthermore, it explores Iran's emphasis on cross-border security and proactive stance against international terrorism, including cooperation with regional and international partners, intelligence sharing, and addressing the root causes of terrorism. The article highlights Iran's active participation in the global fight against terrorist organizations, such as ISIS, by providing military assistance and engaging in diplomatic efforts. The descriptive-analytical method facilitates a nuanced assessment of Iran's domestic and foreign policies and their regional and global security implications. In conclusion, the article underscores the importance of understanding Iran's position within the contemporary geopolitical landscape and its role in the global fight against international terrorism.