The Basic Laws of Human Stupidity Book Cover

The Five Basic Laws of Human Stupidity

The Merriam-Webster dictionary defines stupid as “given to unintelligent decisions or acts,” or alternatively as “acting in an unintelligent or careless manner.” Stupid people cause both intentional and unintentional harm or loss to others, even while deriving no gains (or even suffering losses) themselves. While stupid individuals are not necessarily malevolent, they nevertheless cause damage and represent a threat to society.

Both a study of human history and reflection on one’s own personal experiences confirm that stupidity is not exactly in short supply—but does stupidity’s prevalence across time and space indicate that it operates according to basic universal laws? According to Italian economic historian and professor Carlo M. Cipolla, the answer is yes.

In The Basic Laws of Human Stupidity, Cipolla condenses years of related research into five iron laws of stupidity, which he claims are universal and independent of time and place. All five laws ultimately lead to Cipolla’s primary, disheartening conclusion: Regardless of who you associate with, you will always encounter the same proportion of stupid individuals in every group

Let’s work through the five laws to see if this is a reasonable conclusion. 

Law #1: The number of stupid individuals in circulation is always underestimated

The first law simply states that you will always underestimate the number of stupid individuals in which you must deal with. Since Cipolla does not present a numerical measure or estimate at this point in the book, the reader more or less has to take his word for it. I’m sure, however, that you can recall numerous instances of dealing with stupid individuals, and further, that you can recall examples of stupidity coming from unexpected places or from those once judged to be rational or intelligent. 

If the amount of stupidity in your life has ever surprised you, then you have experienced the first law directly.

Law #2: Stupidity is independent of any other personal or professional characteristic

The second law states that stupidity is independent of race, class, gender, nationality, or education, and that the same proportion of stupid individuals is found in both blue-collar and white collar professions, whether in a group of janitors or in a group of Nobel laureates. Cipolla writes:

“Whether I considered a large university or a small college, a famous institution or an obscure one, I found that the same fraction of the professors were stupid. So bewildered was I by the results that I made a special point to extend my research to a specially selected group, to a real elite, the Nobel laureates. The result confirmed Nature’s supreme powers: [the same] fraction of the Nobel laureates were stupid.”

The problem for Cipolla is that, at this point in the book, “stupid” has not even been defined, let alone demonstrated. So when Cipolla states that a fraction of Nobel laureates are “stupid,” we don’t really know what he means, and further, we don’t know how his research methods were able to distinguish between “stupid Nobel laureates” versus “non-stupid Nobel laureates.” The reader is simply left guessing.

Later in the book, Cipolla will define a stupid person as one who creates losses for others while deriving no gains themselves, but if this is the case, the reader can ask the following question: Wouldn’t a Nobel laureate presumably be creating value for others through their work, or at least deriving personal gains, thus directly refuting Cipolla’s argument based on his own definiton of stupidity? This is something to think about as you move on to the third law. 

Cipolla also makes references to experiments and research that confirm the idea that the proportion of stupid individuals is constant in every group, but we’re never made aware of what those studies are. It seems as if we’re just supposed to take his word for it, which makes for a rather weak, if not intuitively appealing, argument. 

The second law, like the first, seems to hold intuitively, but we’re not given any empirical reasons to accept the claim, beyond vague references to “studies” conducted by the author that are never shared or elaborated on. So while I’m certain that Cipolla is correct in his assertion that stupidity is independent of race, gender, and nationality, his assertion that stupidity is genetic and uninfluenced by education is far more questionable. 

Law #3: Stupid people cause losses for others while deriving no gains themselves

The following table outlines the four personality types to which you may, on average, belong:

Gains (You)Losses (You)
Gains (Others)IntelligentHelpless
Losses (Others)BanditStupid

According to the table, if your actions provide gains for yourself and for others, you are an intelligent and contributing member to society; if your actions provide gains to yourself and losses to others, you’re a bandit; if your actions provide losses to yourself and gains to others, you’re helpless (or altruistic); and if your actions produce losses to both yourself and others, you’re stupid.

We can all think of personal examples of individuals who go out of their way to cause us unnecessary difficulties, embarrassment, or harm, all while gaining nothing for themselves (other than perhaps psychological satisfaction). This person’s behavior is typically irrational and unpredictable, and can only be fairly described as stupid. 

I see no problem in conceding to the truth of this law, but this does not in itself confirm the truth of the first or second laws, which ultimately make unsupported empirical claims, or, if they are supported, the reader is never told how.  

Law #4: Non-stupid people always underestimate the damaging power of stupid individuals

The fourth law states that non-stupid people consistently underestimate the damage stupid people can cause and falsely assume that stupid people will only harm themselves (like the helpless person in the table above). However, unlike the helpless person, the stupid person will create harm and losses for others, in addition to themselves, through unpredictable and irrational behavior. It is best, therefore, to deal with stupid people with caution, if at all. 

Once again, history is replete with examples of stupid individuals creating incalculable harm, and one’s personal life is filled with similar examples of unexpected harm caused by sheer stupidity. We can safely conclude, therefore, that this law probably holds. 

Law #5: A stupid person is the most dangerous type of person

The final law states that the stupid person is the most dangerous type of person, even more dangerous than the bandit. Recall that the bandit derives gains from the losses of others, which results in a transfer of wealth but not in an overall loss to society. Further, the bandits actions are rational (even if reprehensible), and therefore predictable. We can defend against the actions of bandits. 

The stupid person, however, due to the unpredictability of their actions, is harder to defend against. Further, because they are creating losses for themselves and for others, the stupid person’s actions impoversh society as a whole. 

The reader may question the legitimacy of this law. One need only think about the totalitarian dictators of twentieth-century history. By Cipolla’s own definition, these individuals are not stupid, they’re bandits. They orchestrated obscene levels of harm and destruction to benefit themselves by accumulating power, resources, and land. Of course, whether one defines someone as stupid or as a bandit is a matter of definition, so it could be said that the dictator who creates disproportional harm to others, compared to what they receive in personal gains, is therefore stupid. With this more inclusive definition, we can agree to the legitimacy of the fifth law. 

Is stupidity genetically determined?

It’s admittedly very difficult to determine how seriously to take this book. Are we simply dealing with a tongue-in-cheek polemic, or a serious academic essay? The fact that the laws are based on Cipolla’s own academic research and the research of others suggests that it should be taken seriously. Additionally, the laws have an intuitive appeal and seem to match personal experience. 

On the other hand, not one specific study is referenced. No examples are provided. And, most importantly, no explanation is offered as to how groups were formally analyzed to differentiate “stupid” from “non-stupid” people. 

This is specifically a problem for the first two laws, and for Cipolla’s assertion that the fraction of stupid people will always remain constant, as this is genetically determined. In other words, if you’re born stupid, Cipolla is telling you that there is no amount of education that can ever change that fact. 

I think this is almost certainly false. It’s highly unlikely that no one has ever gone from stupid (creating losses for others without any corresponding personal gains) to non-stupid through the pursuit of higher education or other morally-formative experiences. I’m sure you can think of personal examples yourself, fairly easily. 

It’s disappointing to see Cipolla fall for the false dichotomy that is the nature/nurture debate. One’s beliefs and actions result from a complex mixture of genetics, environment, culture, and learning, and therefore any statement that places the blame for one’s actions or personality on either nature or nurture exclusively is almost certainly wrong. 

Overall, Cipolla makes a strong intuitive case for the prevalence of stupidity and for the fact that stupid people are often dangerous and underestimated, and that a certain proportion of individuals are predisposed to stupidity. But the idea that education and culture have no role whatsoever to play in reforming stupidity on a person-by-person basis is far less persuasive. 

The Basic Laws of Human Stupidity is available on