Safety is designed into work, or it is not there at all
For most of the last century the standard explanation for harm at work was the careless worker. That explanation was comfortable, cheap and wrong. What replaced it is harder and far more useful.
There is an old habit in workplaces that refuses to die. Something goes wrong, someone is hurt, and the first question asked is who was not paying attention. The answer arrives quickly because it is always available. A person did a thing, the thing went badly, therefore the person is the cause. The investigation closes, a reminder is issued, a toolbox talk is delivered, and the work continues exactly as it was. Six months later the same event happens to a different person, and the same explanation is produced again with the same confidence. The pattern is so common that it has become invisible to the organisations living inside it.
The shift in thinking that defines modern work health and safety begins with a refusal to accept that answer. Not because people never make mistakes, but because the observation that a human made an error explains almost nothing. Humans make errors constantly, in every task, in every industry, at every level of skill and seniority. That is not a discovery, it is a design constraint. The interesting question is not whether error occurred, it is why the work was arranged so that an ordinary and entirely predictable error produced a serious outcome rather than a minor annoyance corrected in the next ten seconds.
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