I'm aware that in quantum mechanics there are certain events that are causeless, but that's not quite what I'm asking here. For events that "must" have a cause, is it possible to identify a single, direct, original cause that can be safely said to be independant of any other cause? Is it not possible that all events are made up of infinite chains of causes, therefore making it impossible to single out any one as *the* cause? Is it acceptable to identify the most recent cause (the cause the lead directly to the effect in question) as *the* cause for any given effect? I know that in practical terms we have to assume the cause and effect really exists, otherwise our entire law system wouldn't work, among other things. I'm really only just curious as to what the current ideas on the nature of cause and effect are.