Since Trump’s election, I have been wondering how so many people could remain blind to his ignorance and stupidity. The question that most of the world is asking, outside of the US, is, “How could such a large group of people willingly choose such an ignorant, vile, and loathsome human being to be their leader?” What blinded them to the true nature of his character? Were they just as stupid or even stupider than he was? Was it inbreeding, genetics, or some kind of mental virus that had affected their ability to think?
When pondering these questions, I remembered something Darwin had written in On the Origin of Species regarding what he called monstrosities. He used this term to refer to large, sudden deviations from normal development — what today we might call mutations or deformities. In Darwin’s time, some naturalists believed such sudden changes could lead to the formation of new species. I first wondered if such a phenomenon could be applied to mental “monstrosities”, such as the people that support the MAGA movement. However, though Darwin acknowledges that monstrosities occur, he argues that they are rarely inherited.
So I started looking into the possibility that there were other Darwinian forces that could account for the evolution of large populations of stupid people. Unfortunately, it didn’t seem to be likely that there were definitive genetic or evolutionary arguments to account for the rise of the MAGA movement, but there seems to be a strong argument that cultural rather than biological selection is the force at play.
Anyway, here is a summary of my research as summarized by my AI assistant. In my next post I will explore in more detail how cultural selection aided the success of the MAGA movement.
Can Evolutionary Processes Lead to the Development of Stupidity in Human Populations?
The idea that evolutionary processes might contribute to the development—or at least the persistence—of “stupidity” in human populations is provocative, yet not entirely implausible. While intelligence is often assumed to be a universally advantageous trait, its evolutionary trajectory is shaped by how it is defined, measured, and, crucially, selected for or against. Intelligence is not a fixed endpoint of evolution, but a trait subject to the same forces that shape all biological variation. Under certain conditions, evolutionary dynamics could, in theory, contribute to the stagnation or even decline of cognitive traits across populations. Several key mechanisms support this possibility.
1. Relaxed Selection in Modern Environments
In pre-modern societies, individuals with significantly impaired cognitive function may have struggled to survive or reproduce. Today, however, technological and social advancements have dramatically reduced many of the selective pressures that once acted on intelligence. Access to healthcare, education, and social support systems enables individuals across the cognitive spectrum to thrive and reproduce. As a result, traits associated with lower cognitive ability are not strongly selected against. This phenomenon—known as relaxed selection—allows such traits to persist and potentially accumulate across generations. Importantly, this does not require the active selection of “stupidity,” merely the absence of pressure against it.
2. Cultural Selection vs. Biological Selection
Culture operates as its own evolutionary force, and sometimes it selects for traits that are maladaptive from a biological standpoint. In certain cultural contexts, behaviors and attitudes that devalue intellectualism—such as distrust of expertise, glorification of ignorance, or rejection of critical thinking—can spread rapidly through social transmission. These cultural traits may be reinforced within subgroups that prioritize conformity, tribal identity, or ideology over rational inquiry. While this may not directly alter genetic intelligence, it can cultivate what might be called functional stupidity: a widespread suppression of intellectual engagement, regardless of innate potential. Cultural evolution, in this way, can run counter to biological evolution.
3. Genetic Drift and Founder Effects
In small or isolated populations, genetic drift—random fluctuations in gene frequencies—can lead to the proliferation of traits with little or no adaptive value. Similarly, founder effects, where a new population is established by a small number of individuals, can magnify particular genetic traits purely by chance. If cognitive ability-related traits are not strongly selected for in such populations, they may drift alongside other neutral or even slightly deleterious traits. This is especially relevant in societies where reproduction is not linked to cognitive performance or educational attainment, weakening the association between intelligence and evolutionary fitness.
4. Selection for Other Traits at the Expense of Intelligence
Evolution does not act on intelligence in isolation; it favors traits that improve reproductive success in specific contexts. In some environments, traits such as obedience, aggression, or group conformity might confer greater survival or reproductive advantages than abstract reasoning or problem-solving skills. If these traits are negatively correlated with cognitive flexibility or independent thought, then intelligence could decline indirectly. For example, authoritarian societies or high-conflict environments might reward loyalty and aggression more than creativity or skepticism, leading to selection pressures that deprioritize intellectual capacity.
5. Evolutionary Mismatch and Environmental Manipulation
The modern environment is profoundly different from the one in which the human brain evolved. Our cognitive systems—optimized for small-group interactions, survival in nature, and intuitive reasoning—are now exposed to environments saturated with information overload, social media manipulation, and algorithmic reinforcement of biases. These factors can hijack evolved cognitive heuristics, such as tribalism, confirmation bias, and emotional reasoning, resulting in behaviors that appear irrational or unintelligent. This phenomenon does not imply a genetic decline in intelligence, but rather a mismatch between evolved mental capacities and the demands of the modern world. In this context, the appearance of “mass stupidity” may reflect environmental exploitation of psychological vulnerabilities rather than true cognitive regression.
Conclusion
Although evolution does not “select for stupidity” in any deliberate sense, various evolutionary and cultural mechanisms can lead to the persistence—or amplification—of behaviors that resemble cognitive decline on a societal scale. Relaxed selection, cultural maladaptation, genetic drift, indirect selection pressures, and environmental mismatch each contribute to this possibility. Understanding these dynamics does not imply fatalism but instead underscores the need to align cultural, educational, and technological systems with the cognitive architecture of our species. If evolution can make us smarter, it can also, under the wrong conditions, make us appear otherwise.
Of course there are counter-arguments to all of this, so to be fair, I will provide them on my resources page. Here is the link: Counter-Arguments