All the early civilizations that don't exist any more are because they actually led to their own self termination in really critical ways. So it's not like war and environmental destruction is a new topic. It just if the mayons fell, or the byzantine, or the mesopotamian, or the roman,. Even the roman empire fell, it wasn't everything. But exponential sock is existential. That's an way of thinking of it. And that means that we have to be different than we have ever been in the history of the thing we call civilization to simply not extinct ourselves.