India's topography of inequality, exclusion and disconnectivity is as diverse as it is complex, with numerous interrelated dimensions — religion, caste, geography, gender and disability. While this report is built on a vast repository of research literature, reportage and expert interviews, it is not an exhaustive profile every disadvantaged group. Instead, we used three criteria to arrive at a shortlist: groups whose predicament is severe; that make up a significant proportion of India's population; and that are served by a multitude of non-profits. This offers organizations a broad set of nationally-relevant intervention choices and modes of engagement. Applying this standard gave us three groups to explore in detail: Tribals, Dalits and girls; especially adolescent girls. The pages that follow explain what it means to be marginalized in India, how that is borne out by individuals' experiences and who the most disconnected people in India are.