Abandon that which is negative in you and look at the karmic principles, the laws of cause and effect. No events occur without some cause that we have sewn individually, collectively, nationally, internationally.
I will give you one formula. Please contemplate this formula: The bigger the traumatic event means that the cause for it was being sewn for a much longer period of time. And we have forgotten those period because we confine our individual consciousness to one particular decade, and we forget about a millennium through which the chains of events in which our collective has been a participant.