Since the ancient civilisation was destroyed by the group that would later become the WG, does anyone else besides me believe that the ancient civilisation was a benevolent kingdom with no wars and peace everywhere, where people could do what they liked (provided it was not a crime, for example they could say they were pirates without fear of being arrested)?
And the group didn't like the way this civilisation was run, so they rose up against it and formed the WG, only to be crushed by Luffy and co. (later on of course.)