This book presents the latest evidence-based approach in diagnosis and management of the aging of both individuals and society from a gerontology perspective. Amid significant demographic changes such as aging and longevity, one crucial concern is how to live a long healthy life and how community and company can support it. Thus, this book aims to educate society on this vital issue and promote research that integrates the humanities and sciences that welcomes the elderly into an economic market and considers them the new social asset.