I hope so! Of course they were telling lies to themselves. Men have always known the full humanity of the women they were oppressing; slavers have always known the full humanity of the people they held in bondage; the wealthy have always known the full humanity of those they kept in poverty. And all have feared their subjects' rebellions throughout history. Saying you have rule by the people when you're only letting an elite actually rule? That's a lie you're telling yourself. And future societies should recognize that lie.