UPSC aspirants should study historical figures like Mahatma Gandhi, Jawaharlal Nehru, and B. R. Ambedkar for insights into modern Indian history. These leaders shaped India's socio-political landscape and their ideologies continue to influence contemporary governance. Understanding their contributions can enhance knowledge on various topics within the UPSC syllabus, including freedom movements, constitutional frameworks, and social reform movements. Additionally, studying figures such as Subhas Chandra Bose and Sardar Vallabhbhai Patel provides insights into different approaches to nationalism and integration, enriching aspirants' perspectives on India's historical narrative.