The PMC aren't low IQ, they're midwits in the 105-115 IQ range.

Smart enough to grasp concepts of causal relations, interconnected systems, and a myriad of correlations, but not smart enough to intuit system complexity, consider chaos theory, understand game theory, or to see very deeply into any problem. Knowing a little bit about something they are comfortable having opinions about it, because they lack the imagination to understand the immensity of what they don't know.

Socially they go through their formative years as opinionated among peers who never challeng them, because no teenager has a holistic view of anything. This errodes in them over time any sense of humility, and continuing in midwit fields surrounded by other midwits they never grow out of this sense that they have the answers to everything. It's never a very exact answer, if you press them, but always ends in some argument to authority, from an authority that's either also a midwit, or from some data they have completely misrepresented or misunderstood.

They alse tend to reduce everything to 2 dimentions (y is because of x), or 3 dimentions (if we do x right now then we will achieve y), while those smarter are mostly concerned with how systems work in motion, e.g. not "how do we achieve x", but how do we design a system that consistently produces results that trend the closest towards x.

My theory is that; 1) people above and below this midwit-range have more in common with eachother than either have to midwits. And 2) midwits have a lot in common with those who are low IQ (below the 90s).

(1)
People from about 90ish to 105ish are generally not coming up with grand theories of everything and are happy to admit that they don't know. They tend to be concerned with their lives, and have a commonsensic view of things.

People above are also not interested in such theories because they intuitively know that they don't know. They tend to be concerned with their professions or academic fields. Both groups engage with politics only enough to be left alone. This alliance does all the important work and create all the innovation.

(2)
The ones in the midwit range are convinced that they know what they're seeing in the metaphorical fog. Feeling the fog, and feeling that they need to make sense of it, causes anxiety. They study other midwits and build upon their midwittery. And they become obesessed with these grand narratives they're working on in tandem. This conviction makes them want to impose their reality upon everyone else as any opposition or critisism causes mental dissonance. They are natural activists. Their sense of rightousness trains them into becoming propagandists and manipulators. They are natural groupthinkers because their map of meaning consists of the opinions of others, where everything is intertextual and reality is subjective.

The low-IQ see even the everyday life of family, work and entertainment, and the simple systems in place to facilitate the everyday world, as part of the fog, which must be terrifying as in a fog everything is chaotic and complex and hard to grasp and thus frightening and a potential threat. As such they are very quick to take to theories that give meaning to the chaos they experience. Historically that's been religion, but more recently critical theories and thier favorite 'ism' has become a one answer explanation for everything.

This creates an alliance where the midwits knit togeher the framework that the stupes use to justify their actions and situations brought about by their inability to delay gratification and to plan for the future.

The groups intuitively understand each other. The first alliance is united by common sense and positivity born out of their "chop wood carry water" mentality, and a desire to be left alone to enjoy their life. They're ok with uncertainty and therefore they reject grand theories.

The second alliance is united by an underlying constant sense of fear, anxiety, and confusion. They are not ok with uncertainty, becuse more uncertaintly means more anxiety, and they are already at dysfunctional levels of anxiety. Therefore they retreat into delusions. The anxiety also compells them to force everyone to share their grand theories, because any challenge to the delusion is experienced as more anxiety.