Seven Varieties of Stupidity, by Ian Leslie
They are: pure stupidity, ignorant stupidity, fish-out-of-water stupidity, rule-based stupidity…
Very often, stupidity isn’t derived from an absence of mental materials but from a superfluity of them. It is the product of all the stuff we carry around in our minds and absorb from others: powerful algorithms, bad theories, fake facts, seductive stories, leaky metaphors, misplaced intuitions.
… overthinking stupidity…
You can trace a fundamental divide in Western thought between those who believe that knowledge and rationality invariably make us smarter and those who warn they can also make us dumber. On one side, Aristotle, Descartes, Kant, Voltaire, Paine, Russell; on the other, Socrates, Montaigne, Burke, Nietzsche, Freud, Wittgenstein. The latter group includes thinkers who are, in their different ways, interested in the ways that human intelligence generates a unique kind of stupidity.
… emergent stupidity
In my book CONFLICTED I show how avoiding open disagreement reduces the collective intelligence of any group. The more that members of a group follow a rule like ‘agree with the consensus’ or ‘agree with the leader’ the less gets contributed to the general pool of ideas and arguments. The shallower the pool, the more likely it is that something stupid will crawl out from it.
… and ego-driven stupidity
The truth is that stupidity is often an act of will: people make themselves stupid, when it suits them.
Go read the whole thing.