Human behaviour influenced by the "Others" and the "Social situation" is a basic tenet of social psychology, but we seldom come across research that incorporates the underpinnings of international relations when examining psychological outcomes. In fact, mainstream social psychology has been accused of being ahistorical, apolitical, and decontextualized. The neoliberal forces shaping the world's agenda, whether ideological, economic, or political, have impacted social order that is increasingly interconnected. What happens in a distant corner of the world gets communicated very fast and it mobilises people across the world on a sectarian basis. Thus, the social situations have undergone a conceptual shift in geopolitics, where psychological phenomena are less tied to fixed geographical boundaries. The evolving, diverse identities (e.g., the Global South) often share common interests, transcending traditional state groupings. The rising socio-economic and political power of the Global South, exemplified by the BRICS nations, is moving forward to safeguard its economic interests by strengthening its new identities, to face new challenges to the colonial and Cold War-era notions of national and regional superiority. Social psychology, and primarily its identity theories, facilitate a conceptual and practical understanding of contemporary geopolitics at both conceptual and practical levels. The paper addresses the challenging task of developing theoretical frameworks for understanding emerging national and regional identities, thereby enhancing their understanding of the contemporary dynamics of international interactions.