Population longevity stands as one of humanity s greatest achievements. However, aging is often approached with concern, implying more declines and obstacles than advancements. This work explores contemporary, optimistic views on population aging and longevity, aiming to recognize old age as a phase that brings solutions, progress, and flourishing to society. It starts from the premise that the generation born between 1945 and 1964 leads a new change: being over 50 in the 21st century. It seeks pathways to promote purposeful, productive, and contemporary projects for long-lived lives. It embraces the idea that design is instrumental in shaping preferred realities and that we all have the capacity to design new longevities. Its objective is to expand opportunities for projects valuing the benefits of longevity and serving as models for new ways of aging. Three perspectives guide this work: positive psychology, Erik Erikson s psychosocial development theory highlighting generativity from age 50, and the role of design as a transformative agent. It explores themes like ageism, the silver economy, and lifelong learning, relevant in the era of the so-called silver society megatrend.