Why Do We Remain Children for So Long? Biological Evolution, Culture, and the Modern Mismatch

Why do we remain children for so long? This question still seems to me one of the most fruitful for understanding Homo sapiens, because it forces us to hold biological evolution and cultural evolution together without naïvely reducing them to two separate spheres. A long childhood, neoteny, is not just a natural curiosity: it is one of the conditions that made enormous learning possible, more complex sociality, more intense cultural transmission. And yet this very biological slowness, which for millennia worked as an advantage, today appears exposed to the speed with which environments, norms, technologies, and expectations change.

The basic feeling is that culture runs faster than biology, but not in the sense of a final victory of the former over the latter. Culture always arises from biological bodies, from slow brains, from ancient material and relational needs. It never fully emancipates itself from that ground. On the contrary, it continues to operate above constraints that do not disappear: hunger, sleep, fear, the desire for belonging, the capacity for attention, developmental times, vulnerability to stress. When cultural change overtakes too quickly the biological and psychological capacity to absorb it, the result is not a new human being already ready-made, but a mismatch.

The subject of food makes this mismatch almost obvious. The human body was shaped in a world of relative scarcity, of intermittent access to calories, of rare sugars, of forced movement. Today, instead, we live in a saturated environment, where supermarkets and full refrigerators turn an old survival strategy into a clinical problem. The desire for sugars, which in the past helped select precious resources, clashes with constant availability and hyper-stimulation. The outcome is well known: weight gain, type 2 diabetes, insulin resistance, metabolic syndrome. Here the idea of side effect is right, but it must be understood rigorously: not as a random accident, but as the foreseeable consequence of an ancient organism immersed in a recent environment.

This does not mean biology is a sentence. It rather means that every cultural leap must also be read as a test of compatibility with what we are. Culture can multiply possibilities, but it cannot cancel the body’s costs. If it tries to do so, the price is paid somewhere: in health, in relationships, in psychological resilience, in social conflict. Modernity does not abolish biology; it simply makes it less visible, and therefore easier to ignore.

The discussion of roles between men and women is where this tension becomes more delicate. A historical division of labor is plausible: pregnancy, childbirth, and breastfeeding made it more common for women to care for children, while the greater average male muscle mass favored, in many circumstances, more risky or physically demanding activities, such as defense or hunting. In this sense, some bodily asymmetries really did shape forms of social organization for very long periods. But the leap from there to turning a historical tendency into an immutable law is too long.

Biology influences probabilities, constraints, and costs; it does not write social roles by itself. Roles have been, and remain, historical, economic, and symbolic constructions, far more variable than the rhetoric of naturalness suggests. Saying that a woman is “made for the home” or that a man is “made for hunting” oversimplifies a reality that is much more mobile. It is true, however, that some modern changes have been very rapid and have not always taken into account the deep structure of human needs. The more prudent hypothesis is not that roles cannot change, but that they cannot change without friction when pushed beyond certain biological and relational compatibilities.

This is also where the problem of the rhetoric of equality opens up. Men and women are equal in dignity and rights, but not identical in bodily structure, reproductive history, or some average predispositions. A society that pretends it can erase every difference risks producing more friction than emancipation. At the same time, a society that turns differences into hierarchy blocks freedom and hardens destinies. The point of balance remains difficult: to recognize real differences without absolutizing them, and to build institutions capable of taking them into account without being their slaves.

From this also comes the question of political and cultural conflicts. When the transformation of roles proceeds too quickly, reactions of rejection, nostalgia, resentment, tribalism, and even forms of populism or extremism can emerge. It is not an automatic mechanism, nor the only possible cause. Economic inequalities, loss of status, identity crises, distrust in institutions, symbolic pressure are always involved. Still, the core remains plausible: if a culture tries to rewrite bodies, desires, and expectations in a hurry without recognizing biological and psychological limits, it produces a gap that sooner or later someone translates into political opposition or social anger.

To understand this gap better, it helps to distinguish three levels. The first is biological: hunger, satiety, sleep, sexuality, stress, developmental times, vulnerability to contexts. The second is cultural: norms, roles, institutions, family, school, work, models of success, morality. The third is what is mistaken for natural but is in fact historical: habits of an era, consolidated hierarchies, traditions presented as destiny. Many contemporary disputes arise precisely from the confusion between these planes. An old norm may seem eternal, yet be only the result of a specific economic and social arrangement. A real difference may be used to justify an unnecessary hierarchy. And a cultural construction may be defended as if it were a fact of nature.

If one wants to analyze seriously, a few simple tests are needed. How much does something vary from society to society? How quickly does it change over time? What happens when it is forced beyond measure? If a disposition or a norm changes within a few decades, it is very likely cultural. If a dynamic appears repeatedly in different contexts, there is more likely a biological basis. But none of these criteria is enough by itself. Universality does not coincide with rigidity, and variability does not eliminate every constraint. When a human system is forced, the body and behavior pay the bill with stress, compensations, addictions, somatizations, conflicts.

On this point, the relationship between men and women must be handled with particular care. The real mistake is twofold: either one says everything is nature, and then every difference becomes destiny; or one says everything is culture, and then one ignores that bodies are not interchangeable and that certain asymmetries have concrete weight. The strongest position is more sober: real biological differences exist, but social roles are not a simple translation of biology. They are historical constructions that can be more or less compatible with it. Society can redistribute tasks, but it cannot completely abolish the materiality of the bodies that carry them out.

There remains then an even more radical concern: the average human being is not culturally prepared enough to live in a state of continuous and serious reflection. In theory, we can build very convincing logical models; in practice, however, many people move through automatisms, imitation, belonging, fear, the desire for approval. Violence itself rarely comes from a single impulse. Often it is a mixture of impulse, humiliation, psychological fragility, a culture of domination, inability to manage frustration, lack of emotional education. Saying it is “instinctive” captures something, but leaves out the context that makes it possible.

Here another decisive intuition appears: one must not confuse theoretical correctness with the real maturity of a society. A society can proclaim lofty values and remain psychologically childish; it can declare itself emancipated and produce regressive behavior; it can multiply tools and remain poor in self-control. In a world saturated with distractions and quick approval, it becomes increasingly difficult to distinguish authentic conviction from simple social adaptation. Culture accelerates, but lucidity does not accelerate on its own. Without the formation of character, without education in discernment, without the ability to remain with difficult questions, modernity risks becoming a sophisticated environment inhabited by people who are easily lost.

For this reason, the basic thesis is not that culture must go back, nor that biology must prevail over culture. The question seems deeper: culture works well when it dialogues with biology, and fails when it tries to replace it completely or deny it. At the same time, biology alone is not enough to explain human life, because our destiny always passes through institutions, symbols, techniques, education, forms of coexistence. The human being remains a culturally powerful and biologically constrained animal, but also a fragile subject, exposed to sudden drifts, capable of lucidity and self-deception with equal ease. Modernity does not eliminate this contradiction: it only makes it more visible.