In this fascinating historical episode of CARECAST, we journey back in time to explore the monumental shift that changed the landscape of aging and cognitive care forever. For centuries, the cognitive decline of older adults was largely dismissed as a vague, unavoidable, and untreatable condition known simply as "senility." We uncover the story of the pioneering medical mind who challenged this assumption, pulling back the curtain on the specific pathology of what we now recognize as Alzheimer's disease and other forms of dementia.