Rabindranath Tagore (1861–1941) is typically regarded as a lyric poet, with his 1913 Nobel Prize cementing his status in global literature. This article contends that this perspective conceals what may be his most significant accomplishment: the persistent application of imaginative literature as a tool for social reform in colonial Bengal and, by extension, in contemporary India. Focusing on liberation as a central theme, the research explores how Tagore's novels, short stories, and plays engaged with three interconnected aspects of Indian social life in the nineteenth and twentieth centuries: the status of women, the caste system and untouchability, and the dominance of ritual orthodoxy. By meticulously analysing Chokher Bali (1903), Gora (1910), Ghare-Baire (1916), the Sabuj Patra short stories from 1914 to 1917, Achalayatan (1912), Raktakarabi (1924), and Chandalika (1933), while contextualising these works alongside Tagore's essays, letters, and institutional initiatives at Santiniketan and Sriniketan, the article introduces a triadic framework for assessing literary social influence: normative reframing, institutional embodiment, and cultural sedimentation. It contends that Tagore's unique contribution resided not in contentious advocacy but in a narrative technique that shifted reform from the realm of legislation and scriptural debate to the domain of introspection, thus rendering the ethical implications of social norms accessible to everyday readers as lived experience. The article critically examines the constraints of this accomplishment—Tagore's bhadralok social position, the mediated nature of his subaltern representations, and the argument that his female characters are liberated inside, rather than beyond, patriarchal structures. The conclusion indicates that Tagore's primary legacy is a framework for ethical reasoning on social existence that continues to be relevant in modern Indian public dialogue.