Negligence and Human Error
Not sure how WL's comment is addressed to but, first, I thought it was now accepted that almost all adverse events are solely caused by human error. I can think of some aircraft destroyed by debris from buildings trashed by hurricanes (Homestead AFB a few years back for example) but the rest is down to us.
However, we need to be careful to distinguish between accidents that arise from operations exceeding a threshold of controllability and those arising from acts of negligence.
When I was talking about a model of success earlier I had in mind the sort of training needed to make pilots more sensitive to the cues that indicated that they were close to being in a state of 'uncontrol'. Elsewhere on this site there is a video of the ALPA safety conference closing address. The speaker is actually making this point. Current training and checking regimes have been trimmed to the extent that some pilots are unaware of the performance margins available to them ... and so they screw up. That's error but its not negligence.