Today's common knowledge may fade to psychological trivia in a thousand years. If humanity has systematically got its shit together, will this be because everyone understands the biases that let us do terrible (if, arguably, occasionally necessary) things, or because we are simply systematically denied the opportunities to enact them? I hope and expect the former (insofar as I expect humanity's future to be bright at all, which is to say, not much), but I cannot rule out the latter.