International relations form a significant portion of the UPSC syllabus due to the growing importance of global interactions in contemporary governance. Topics such as diplomacy, international organizations, and geopolitical issues are crucial for understanding how nations engage and collaborate. Aspirants must study bilateral and multilateral relations, focusing on treaties and strategic partnerships. Understanding global challenges like climate change, terrorism, and economic interdependence is essential. Current affairs related to international relations often feature prominently in both the prelims and mains, thus requiring candidates to stay informed and analyze global trends.