Statistics have been clear, humans are living longer (1). India, projected to be the most populous country in the world as the Chinese have been systematically controlling the birth/death ratio for long, cunningly culling the variety that could create more, has been able pump up nearly 20% of the world population to longer life expectancy. In India today, one is expected to live till 65 and the world at large to 71. The more important question is whether living longer is better.
Biological systems are preprogrammed to maximize life span. The basic equation is driven by reproductive requirements and those living longer are more likely to transmit their DNA to the next generation. Nature, with little flexibility to adjust to technological advances, seems to have gotten it wrong. Living longer is the biggest liability in the modern world, controlled by humans, who do not think straight. Today, over 80% of the healthcare costs of an individual is attributed to the last year of her life. For the individual, waiting to fade away in dignity, extension of life is likely utility destroying.
There could be an optimal life span for a human driven by the status of technology and the availability of resources. Moving outside such bounds is unlikely to be good and this has policy implications for medicine, education and societal formation.
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