If from Paleolithic to the height of Roman Empire, then trends would be exactly opposite, a march from freedom to slavery.
Um... You believe that between Paleolithic and the height of Roman Empire the progress went in reverse?
If we define "progress" as "less slavery, less torture, more freedom" as in top comment, then yes it went in reverse.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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