In its syllabus, the UPSC defines 'national integration' as the process of unifying diverse cultures, languages, and religions across the country. This concept is crucial for fostering social cohesion and stability within a multi-ethnic society like India. The syllabus encourages candidates to understand the historical context of national integration and the ongoing challenges faced in achieving it. By emphasizing this aspect, the examination aims to prepare civil servants who promote unity and inclusivity while addressing regional disparities within the nation.