"How the Other Half Dies" is a book by Susan Sontag that explores the disparities in health and mortality between different social classes. It highlights how socioeconomic factors influence access to healthcare, nutrition, and living conditions, leading to significant differences in life expectancy and quality of life. The title refers to the stark contrast in how the wealthy and the poor experience death and illness. Sontag argues that societal neglect of the marginalized contributes to their suffering, emphasizing the need for systemic change to address these inequalities in health and well-being.