Depression in old age represents one of the most significant yet frequently overlooked public health concerns of the twenty-first century. As populations continue to age worldwide, understanding the psychological challenges associated with later life becomes increasingly important. A central question in geriatric psychology concerns whether depression should be viewed primarily as a natural process associated with aging or as the outcome of biological, psychological, and social risk factors. This study examines contemporary perspectives regarding depression in later life by integrating findings from psychology, psychiatry, gerontology, neuroscience, and public health research. The article evaluates the influence of physical health decline, social isolation, bereavement, cognitive changes, socioeconomic factors, and resilience mechanisms. Findings suggest that depression is not an inevitable consequence of aging but rather the result of complex interactions among multiple variables. The study argues that understanding depression as an outcome rather than a normal aging process may improve prevention, diagnosis, and intervention strategies.