There is always someone we have known all our lives and who, at some point, seems to change frequency. First he talked about work, movies and holidays. Then, almost without warning, he begins to see conspiracies everywhere, to defend rock-solid ideas, to react badly to any doubt. He didn’t suddenly become “bad” or stupid. More likely, his brain found a shortcut.
In recent years, science has been putting together the pieces of an uncomfortable but fascinating story: the ideas that convince us most do not only depend on what we read or the environment in which we live, but also on how our brain manages complexity. And this is where political neuroscience comes in.
When the mind loves simple answers
Researcher Leor Zmigrod, who works at the University of Cambridge, has been studying the link between brain and ideology for years. His starting point is disarming in its simplicity: some minds tolerate chaos better, others experience it as a threat. And when the world becomes confusing, unstable, full of contradictory information, the brain does what it does best: it seeks order.
This is where cognitive rigidity comes into play. It is not an illness, nor a moral defect. It is the difficulty in adapting when the rules change, in revising one’s ideas, in remaining in balance when reality becomes complicated. Research shows that those who are more mentally rigid also tend to cling more strongly to clear-cut, closed, often extreme views of the world. Not because I love extremism, but because those ideas reduce mental effort. They offer clear boundaries, recognizable enemies, ready answers. In practice, they function as a tidy room when disorder rages outside.
There is a detail that always surprises: this rigidity does not concern just one political area. Research shows that the most extreme positions, both on the right and on the left, share the same “mental style”. The contents change, not the way of thinking about them. It is the reason why apparently opposite ideologies end up resembling each other in tone, in their intolerance of dissent, in their absolute certainty of being right.
More moderate people, on the other hand, tend to have greater cognitive flexibility. Not because they are better, but because they can live with doubt. And doubt is tiring for the brain.
The hidden “signature” of extremism
A recent study published in Philosophical Transactions of the Royal Society B he went one step further. By analyzing memory, reaction times, personality and emotions, researchers have identified a sort of psychological signature of extremism. Not a label, but a set of characteristics that tend to occur together.
Those who are more inclined to support radical ideologies often struggle to keep together a lot of information at a time, update their perception of reality more slowly and, at the same time, show strong emotional impulsiveness. Translated into daily life: complexity is tiring, while drastic responses provide relief.
It’s a powerful mix. On the one hand a mind that prefers simple explanations, on the other a personality that reacts instinctively. This is how some ideas become not only convincing, but also identifying. Defending them becomes defending yourself.
Ideologies don’t stay in the head. They pass through the body. Previous studies have shown that some ideological differences are also reflected in brain areas linked to fear and emotional reactions. And it’s not just an abstract question: those who perceive inequalities as intolerable react physically to the suffering of others, while those who consider them “natural” tend to remain emotionally neutral. Not out of coldness, but out of habit. The brain trains itself to hear – or not hear – certain things.
Social networks: the perfect terrain
In all of this, social networks act as an amplifier. Algorithms show us what confirms our ideas, reducing contact with what challenges them. For a mind already fatigued by complexity, it is an irresistible temptation. Less effort, more certainties, less friction. The result is a slow, almost invisible spiral. At first he just seems to get better informed. Then it becomes choosing only one version of the world. Finally, defend it at all costs.
Perhaps the most interesting part of this research is also the most reassuring. No one is born an “extremist”. And no mind is condemned to rigidity forever. Cognitive flexibility is not an innate talent, it is a daily exercise. Changing sources, listening to those who think differently, accepting that you don’t always have an immediate answer: these are small mental workouts that keep the brain elastic in order to remain human in a world that pushes towards aggressive simplifications. Ultimately, often, it is not what we think that defines us, but how we get there.
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