[derefr]

> Just because they lived in fucked up times, compared to our current standards, does not mean they experienced a different quality of suffering.

Perhaps it's more about "you can get used to anything." Happiness set-point theory, etc.

If you're always experiencing some low level of pain, then the pain soon stops being distracting. It still has pain qualia, if you focus on it; but those qualia no longer impact your life. You learn to function around/through that pain. It stops having relevance to your brain's decision-making process. It stops being processed consciously.

And someone who has learned to do that, if they experience a set, larger amount of pain (a tooth being extracted, say), will experience less subjective pain relative to someone not already experiencing that low constant underlying pain, because the relative amount of pain they experienced—the pain they haven't learned to ignore, the pain that leaps to conscious attention—will be less for them, than it is for the person who normally experiences no pain at all.

Now take that concept and apply it to mental anguish or guilt/shame. I would expect that it would imply that people who lived in times where everyone had all sorts of reasons to be anguished, and thus were low-level constantly anguished—would end up less likely to get PTSD, simply because there are fewer things in their lives that can truly "pin the needle" of anguish enough to cause PTSD, when the tare on their "enough anguish to rise to conscious attention" scale has been reset higher.