Additionally, you have to probe, how did the 'different perceptions' come about? Because, in the end, the perceptions are built on the narratives we tell ourselves, that's why this project is so important. In other words, of course we are all interpreting slavery etc. based on our understandings and lived experiences, but some interpretations erase most of the picture in favor of ideas or ideals that you can speak into existence but don't exist in flesh and blood, like "liberty" "all men are created equal" etc.