Longetivity.
An ageing society view focuses on changes in the population structure, whereas a longevity society perspective focuses on changes in how we age and the exploitation of life-expectancy gains. Both the ageing society and the longevity society pose crucial challenges for the decades to come, and both are unprecedented developments in human history—never before have so many lived for so long—yet longevity is the more distinct of the two. The problems of an ageing society are related to scale and are about how many people are living to older ages. Throughout history, many individuals have survived into their 70s and 80s. By contrast, longevity poses a distinct and original problem, that is, the need to plan for the very plausible probability that children born today in high-income countries will live into their 90s and even beyond. The combined forces of ageing and longevity produce a mix of both opportunities and problems. This Health Policy examines some of the broad issues a long