The so called “law of unintended consequences” (or “law of unforeseen consequences”) is not a true Scientific law such as Ohm’s Law, but a humorous expression in common use according to which any purposeful action will produce some unintended, unanticipated, and usually unwanted consequences. Stated in other words, each cause has more than one effect, and these effects will invariably include at least one unforeseen side-effect. The unintended side-effect can be more significant than the intended effect.
The subject of this sounds suspiciously system-like as it has ‘purposeful action’ ( a human-centric view of the attributes of a system, admittedly) and the results could well be regarded as emergent properties. A bit further into the Wikipedia article suggests that causes might be the complexity. The sociologist Robert K Merton is credited with making the concept popular and he applied it to social systems and suggested that the possible causes of the problem ....