Has anyone ever considered the possibility, that you may have at one point in your life, inadvertently killed somebody after setting of a chain-reaction of events that eventually leads to some tragedy for another person?
For example. A guy rams his trolley into your ankles at Wallmart and walks away without saying sorry. You call him a "prick", and he goes home in such an enraged mood that he murders his wife with a toilet plunger to the face.
I could potentially be starting a chain of events with this very post.