Earlier quoted context omitted.
Slavery has existed for all of human history, and is sadly the natural state of things. It was stamped out by the British empire, a colonising power, because of the relentless campaigning of Christian moralists. Imprisonment is indeed a newer development. In the past they chopped off your hand and let fate deal with you, or they just executed you. Nobody was going to feed some peasant who couldn't even work. Imprison…
> is sadly the natural state of things Sadly, the even-more-natural state of things involves the total extinction of all known forms of life and nothing but the cold vacuum of space. So we should be very careful not to equate that particular kind of "natural" with other concepts like "unavoidable" or "acceptable".
Natural and unavoidable mean the same thing in the context the GP used them.