Reprint of the original, first published in 1873.

States that the number of genuine long-livers is exploding and a substantial proportion of new-borns in developed countries may survive to celebrate their 100th birthday. This book examines the storied realms of exceptional longevity.

There is perhaps no other single technology or industry subsector, with the exception of AI, that has more potential to accelerate the realization of real-world impacts in Longevity across the full scope of its sectors and domains - industry, policy, investment, entrepreneurship, policy, and governance - than Biomarkers of Human Longevity. Given the unique confluence of Biomarkers of Human Longevity's disruptive impact and accelerative potential, on the one hand, and the high degree of disharmonization in terms of what they are and how they could and should be used, on the other hand, it is clear to me that there is a pressing unmet need for the production of a dedicated book that takes Biomarkers of Longevity as its central concern and major fulcrum, identifying the true potential that this technology has to increase individual and national Health-Adjusted Life Expectancy (HALE) and Quality-Adjusted Life Expectancy (QALY), optimize strategic decision-making for start-ups and corporations, de-risk investment, provide for the first time a tangible framework for company valuation, due diligence based on human validation, enable reliable forecasting clinical outcomes, serve as an effective platform for safe self-experimentation and personalized therapeutic fine-tuning, and pave the way for a much more tangible, stable and scalable Global Longevity Industry, where Longevity's socially-inclusive humanitarian impact is maximized and its potential ethical and socioeconomic concerns are neutralized. Deep Knowledge Group and its Longevity-focused subsidiaries and affiliates, including its analytical subsidiary Aging Analytics Agency, its specialized investment arm Longevity.Capital, its portfolio companies Longevity Banking Card and Longevity Financial Advisors and the international non-profit consortium Longevity.International, have prioritized the pressing need and the extreme potential of Biomarkers of Human Longevity (and integrated them in various ways into its overall scope of activities and strategic agenda) for several years now, and are expertly positioned to provide a tangible understanding of the major challenges and opportunities to be faced within this domain, and how they can be applied by individuals, institutions and even entire governments in order to achieve their maximum benefits while neutralizing potential pitfalls and issues.

Three Score Years and Ten: Or More? delves into the enduring fascination with individuals who live beyond 100 years. The intrigue centres not only on the accomplishment itself but also on the mysteries of how and why these people achieve such remarkable longevity. This research shifts its focus from contemporary centenarians, whose ages can be more reliably verified due to improved record-keeping, to an earlier era marked by less clear historical records. It investigates the genesis of this interest and the emergence of what could be termed a ‘cult of centenarianism.’ During this period, claims of extreme old age sparked debates between believers and sceptics, creating a cultural divide. The book also examines the significant role media played in this phenomenon. The portrayal and promotion of centenarians by the media of the time laid the groundwork for themes explored in this book, contributing to the ongoing public intrigue surrounding individuals of advanced age.