International events influence the preparation for current affairs in UPSC by shaping the global context within which national policies are framed. Aspirants must stay updated on significant geopolitical shifts, trade agreements, and international collaborations, as these topics frequently appear in the exam. Regularly following reputable news sources and journals enhances awareness and understanding of complex interactions between countries. This knowledge is critical for articulating responses in the Mains exam and interview, where an understanding of global dynamics is often assessed.