Most of us a smart in some way, and stupidly incompetent in another.
Most of us a smart in some way, and stupidly incompetent in another.
-That's the definition I'm using. Lack of competence or knowledge can both be causes of stupidity, but that's not really the point I'm making.
My point is that whatever the cause, stupidity is not a constant. It is situational and also varies over time. Smart people act stupidly from time to time as well. Additionally, when you take an action that is a gamble, sometimes you lose out even if the odds where in your favor. That's not stupidity, even though by this strict definition of the term it could be defined as such since loss has occurred with no benefit.
Mostly, what I've seen of "stupid" behavior (in Cipolla's use of the term "stupid") is the result of such motivations as spite. Spite appears to be one of the strongest motivators in human nature, and is purely destructive. It is, at its best, designed to not do the spiteful party any harm -- but no thought is put into doing oneself any good. It is often veiled in justifications related to evening some imaginary scales between a "bandit" and a "helpless" victim, but all too often it is simply spite beneath the surface -- in short, it is a special case of stupidity (and my own least favorite form of stupidity, because of its petty malevolence).
This has little or nothing to do with IQ and other conventional definitions of "intelligence" and "stupidity". It is, as I've said above, about patterns of behavior (and, to an extent, the motivations that produce those patterns).
That pretty much sums up what I was saying :) That's why I take issue with labeling people as 'stupid people' because like anything, it is rarely as cut-and-dried as that.
In that context, "stupidity" also means ignorance, which should avoid actual recursion.
That is, I don't think most stupid behavior is caused by spite (malice) but rather obliviousness (ignorance).
To the extent that emotional forces are the primary mediators (as opposed to purely rational ones), I think that Cipolla's stupidity correlates well with the notion of "emotional intelligence" that people talk about nowadays.
I mostly refer to spite by its biblical handle "bitterness". I agree with you, that it's one of the most common and powerful emotional handicaps.