Lifespan growth in the last 160 years:


And this is the Biotech/Medical Science Humanity has as a Tech Level 9 race (source: http://well-of-souls.com/outsider/tech_level.html) by GURPS standards:


SOURCE: http://wiki.travellerrpg.com/Processor_Epoch

QUESTION: What is the natural Human Lifespan in 2160 on Outsider Earth?

PS: I couldn't find 3E GURPS. But I asked on Reddit and they told me that 4E Tech level diverge mostly post 10th level. And that it mostly concerns anything but biotech and medical sciences anyway.

I believe in a topic here or on the old outsider forums it was mentioned that humans have gene replacement therapy that has allowed people from the twentieth century to possibly still be alive in outsiders era. Though I doubt most could afford the treatments going that far back.

I guess that depends on what you mean by a "natural" human lifespan. Human longevity has varied greatly due mainly to environmental factors, without much or any biological change in humans themselves.

In the real world, I expect lifespan to increase dramatically as gene therapy comes into its own. This will probably be expensive enough that not everyone will be able to afford it, and the benefits may not evenly affect the entire population. So an average lifespan number might not be very meaningful. I expect this will also cause an increase in population beyond what is currently projected. Some take comfort in the fact that birth rates have begun to fall in many developed countries; I don't find this as comforting, especially when birth rates in undeveloped countries are still high, but even in developed countries populations will continue to rise, since old people won't be conveniently dying the way they're supposed to.

It's reasonable for humanity in Outsider to mirror this, but it doesn't really have an impact on the story.