A single whack is not good enough. Repetition is very important. There has to be multiple severe whacks before everyone understands what's trully going on in this world. The implications of the Hubbert Peak on oil production is going to give us the opportunity for an enormous reality check. (i.e. we might want to care a little bit more about the fundamental things on which our society is build upon and change our way of life such that we live more in harmony with nature.)