Interdisciplinary knowledge is crucial for UPSC aspirants as it fosters a holistic understanding of complex societal issues. This diverse knowledge base allows candidates to approach problems from multiple angles, enhancing critical thinking and analytical skills. Familiarity with various fields like politics, economics, and environmental studies equips aspirants to tackle questions effectively, especially in General Studies papers. Furthermore, it enables them to contribute to policy-making discussions and represents the integrative role of civil services in governance.