[ledauphin]

average, yes, but living to 70 was reasonably common if you made it past childhood.

[pcthrowaway]

I was under the impression living to 70 would have been very rare in, say, 1100 CE

[layer8]

Figure 2 in https://gurven.anth.ucsb.edu/sites/secure.lsit.ucsb.edu.anth... suggests that about 15% of hunter-gatherers would reach age 70.

[abathur]

Not deeply knowledgeable here but imagine this depended quite a bit on where you were living in 1100 CE.

I think it was fairly rare in Europe, but IDK how well those numbers capture what was common for the majority of the human population living elsewhere.