Actuarial escape velocity

Actuarial escape velocity is the concept of a point in time at which the rate of advancement in biomedical technology surpasses the rate at which humans age.
At this point it is proposed the average human life expectancy would increase by at least one year each year. In this manner, reaching acturial escape velocity has been proposed as a mechanism to achieve indefinite lifespan.

The concept was first publicly proposed by David Gobel, founder of the Methuselah Foundation. The idea has been championed by biogerontologist Aubrey de Grey and futurist Ray Kurzweil. These two claim that that by putting further pressure on science and medical to focus research on increasing limits of ageing, rather than continuing along at its current pace, more lives will be saved in the future, even if it does not immediately seem apparent.

Calorie restriction is often presented as a piece of the puzzle of reaching actuarial escape velocity.
 
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