Aging is an irreversible natural process; we as humans develop many age-related disadvantages impacting many aspects of our life. Aging is not a negative process, but the ever-increasing band of the aging population creates a different socioeconomic and healthcare cost-associated risk that may hinder the sustainable development goals of any country and the world in general. Thus, the primary purpose of this book is to cover all aspects of the aging population. Each chapter in this book will give its readers a comprehensive understanding of how an aging population affects public programs such as pension plans, social welfare aids, healthcare costs, asset loss, and labor income, including chapters focusing on the demographic distribution of age-related diseases and injuries that increase healthcare cost, current social psychological reforms, and scientific research work adopted continent wise towards sustaining the aging population. Therefore, this book is helpful for students, teachers, and practitioners studying/working in the broad areas of social sciences, economics, and scientific research advancements in aging. This book serves as a bridge toward planning and developing new policies and practices.