> To be Roman, and citizenry became quite broadly spread, during those few centuries, was to be free and safe.

It's pretty plain here that the parent is arguing that Romans, not their slaves, were free and safe. Anyway, the idea that Rome is worse than its contemporaries because of slavery or some other failure to adhere to 20th (or 21st) century mores is silly (though fashionable) without making a case that said contemporaries performed better by those same standards.

However, I do think that by modern standards, all governments were terrible back then. Most of history is like that. It's mostly about cruelty and suffering.

I was only clarifying since you were responding to a comment comparing Rome to her contemporaries. No one argues that Rome was more enlightened or less brutal than modern first-world nations, but many do argue that Rome was relatively more backwards than her contemporaries on the basis that Romans practiced slavery and colonization (ignoring that her contemporaries did the same or would have done if they had the ability).