La estupidez estratégica

We have all stumbled upon stupidity at some point and adopted behaviors that, in hindsight, do not seem sensible at all. Sometimes it is even an excess of reason that makes us stupid, when for example we persist in defending our ideas even if they fail, confusing determination with stubbornness and tenacity with closed-mindedness. Blinded by ephemeral successes, instead of correcting these attitudes, we repeat them with total conviction and end up turning occasional manifestations of imbecility into a permanent character trait. Stupidity does not exist in nature, it is not a biological defect; it is an entirely human product, but it represents the greatest danger to humanity, a sneaky virus to which no one is immune. What is the origin of this attitude? What consequences does it have in daily life?