Perhaps in the time of hunter-gatherers where every person had to pull their own weight we were equality driven but even then, I doubt it. A variation of equality? Sure, but we were still likely dominated by strong central figures of authority. Otherwise, the establishment of states and major cities lead by singular kings wouldn't have become our defacto political organizational method for most of our recorded history.

It's a nice idea to want to believe that equality and fairness are at the root of our nature as a people but when it comes to governmental systems everything points to the exact opposite; that we're drawn to authoritarianism for one reason or another from personal feelings to your average person simply not caring all that much as long as it doesn't affect themself.