I would describe what we have already done as radical life extension. Perhaps we have a difference in definition. From this link:
In 1900, the average life expectancy of a newborn was 32 years. By 2021 this had more than doubled to 71 years.
My understanding is that this phenomenon is mostly due to infant mortality. Like we get a bunch of dead zero-year-olds yanking the average way down. I’m given to understand that even in 1900, once someone hit 30 they were pretty likely to live for several more decades.
(I’ve not checked this carefully though. Reporting remembered impressions, not careful research.)
My understanding is that this phenomenon is mostly due to infant mortality. Like we get a bunch of dead zero-year-olds yanking the average way down. I’m given to understand that even in 1900, once someone hit 30 they were pretty likely to live for several more decades.
(I’ve not checked this carefully though. Reporting remembered impressions, not careful research.)