I've scanned the article, which seems to suggest that practitioners are out there as we speak promoting and working to outdated and out-moded theories on accident causation as promulgated by Heinrich in the middle parts of the last Century. I honestly don't think I'm guilty of this, and here in the UK from the beginnings of my involvement in H&S I was aware of the HSE promoting the opposite view to Heinrich's assertion that the majority of accidents are down to unsafe acts by workers. Current safety "theory" may be one thing, but my experiences, learning and interractions with others suggest an opposite (and satisfactory) view. I did have a wry smile at the reference to Stefansson's 'The Standardization of Error'(1928) which makes the case that people are willing to accept as fact what is written or spoken without adequate supporting evidence. The popular press have been trading on that behaviour for a long, long time! I do worry a bit about Stefansson, and wonder if he was at least part Vulcan. He does seem somewhat obsessed with logic - not the most evident behaviour of the human condition.