We would hit a reset button. Take steps backward. Be able to reverse bad decisions made, with hindsight. Of course, this assumes that you could sort the good from the bad, without cultural bias. And all agree on these new directions.

In reality, this could only happen with a catastrophic reset, where whoever survives decides how we go forward. And of course, those deciding will be biased about the need to survive and will not necessarily make the very best choices.