More like 90% of human actions are stupid, as I’m not sure if there’s an even split of “the stupid” and “the smart”, and plenty people mix both. (E.g. being oddly competent at something specific, only to vomit assumptions on something else.)

In special I feel like four types of stupidity became a bit too common, too harmful, too egregious. They’re the failure to handle:

• uncertainty - or, “how your belief might be wrong, and you’ll need to handle the case that it is wrong”
• complexity - or, “how small details have a profound impact on everything”
• undesirable possibilities - or, “how nature gives no fucks about your fee fees, and things don’t become true because you roll in wishful belief”
• context - or, “how things are never isolated, and you need to look outside the thing to understand the thing”

They’re intertwined, I think. And perhaps there’s something more important than those, but those four are the ones that I notice the most.