>>5 considering the number of these events are not so far apart on the calendar does not mean they all have a similar cause or root as you put it. I understand you may not mean that they all happen for the same reason (like some mastermind's plan), besides viewing the side of mental health then that could be a similar variable between all the events (if that's what you mean). overall humans may like the idea of an overarching villain of some kind that's pulling the strings, but who knows that may not be to far from the truth.