all this talk of adding 30 years to a life span. You guys know that means mostly that less babies died right?
People like Ben Franklin lived into his eighties. Many people lived into their sixties for a good chunk of human history. High infant mortalities are what cause those numerical changes.
The other big change in life expectancy, though much less that infant mortality, comes from things like vaccines, antibiotics and the ability to do surgery without the risk of almost certain death from exposing the internal organs to outside air.
After that it's ability to repair injuries and illness based damage.
Almost all the gains on life expectancy have been made by changes to early survival and avoiding death by outside forces. We have become good at mitigating the risks and repairing the results of life, but not much in the way of adding any length to it.
I don't see genetic therapies being all that advantagious in humans, their largest potential I feel is in making bacterial farms that produce the proteins that a given gene would make in a human that we can then give to people as medicine. Because altering the gene may actually alter another gene that shares base pairs with it that we do not wish to alter, where as we can achieve the effect of having altered the gene via simply producing the drug/medicine with the compounds the gene would produce. Between that and altering the genes of the microbiome to optimize them while making them more resilient and more controlled. Or altering the genes of parasites and bacteria so that the can more easily be targetted or made non-infectious to humans.
That would be a huge step but again it tends mostly toward aftercare of the effects of life on people.
Printed organs, now that I see huge potential for. The first generation or two will likely be less capable than the ones we are born with. But I imagine we will likely see organs reach a point where swapping out a heart or kidney would be like getting a new fuel pump or filter for a car.
Once you can do that for organs and replace connective tissue or build new limbs the biggest limit on life is the central nervous system.
So provided you avoid dementia and other neural related age declines I can't imagine that we won't see at least a few reaching 230 years old. and if we manage to crack the neural decline issues with stemcell therapies and drug therapies made from genetically engineered bacterial farms that could well become the standard age many reach. and beyond.
I think at that point the threshhold becomes 5-800 years with the limits of the the human brain to contain new material, which by then we would hopefully have means of getting around that limit.
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