De Grey, Zhavoronkov, Ringel and Church debate when medicine will be able to repair age-related damage faster than it accumulates
De Grey, Zhavoronkov, Ringel and Church debate when medicine will be able to repair age-related damage faster than it accumulates
In The Beyond Tomorrow debate on October 15, biogerontologist Aubrey de Grey, entrepreneur Alex Zhavoronkov, geneticist George Church and biotech executive Michael Ringel offered timelines ranging from 12–15 to 20–50 years. The spread reflects different definitions of success: ongoing repair of the body, a finite extension of life, or a measurable outcome.
De Grey coined the term longevity escape velocity. It describes the point at which age-related damage is repaired faster than it accumulates, keeping biological age stable as chronological age increases.
De Grey puts the odds of reaching this point within the next 12–15 years at 50 to 50. He bases this estimate on the pace of research into repairing different types of damage and a target of postponing age-related decline by twenty years, which he believes would be enough to achieve longevity escape velocity.
Zhavoronkov considers 20–50 years a reasonable timeframe. In his view, achieving this will require a brain-computer interface in addition to drugs and organ replacement. Even if his drug development programs succeed, he estimates that they would add a little over ten years of life.
AI can identify a target for a new therapy and candidate molecules within days, Zhavoronkov says. Preclinical experiments and human trials then follow. For cardiovascular and metabolic diseases, he expects studies to take a decade.
Ringel considers an infinite human lifespan impossible under the known laws of physics. He leaves open how long a finite lifespan might become. His reasoning draws on model organisms, living organisms used to test biological ideas: some interventions have extended their lifespans severalfold.
Church proposes a different test: if a person gains ten additional years of life per decade, that outcome would take roughly ten years of observation to establish. The next decade would require another assessment. In an analysis of whether humans could live to 200, epidemiologist Jay Olshansky describes the same problem of verification: assessing a promised 50 additional years requires waiting that long.
Comparing these timelines requires a shared criterion for success. De Grey focuses on the rate of damage repair, Zhavoronkov on the path to the technology and the time needed to test it, Ringel on the limits of lifespan extension, and Church on the time needed to measure the outcome.