We Are Animals: What We Are Is a Product of Evolution

 

For centuries, humans have told themselves a story: that we are something other than animals. Nature, the story goes, is what happens in the forest or on the savanna, and we, with our cities, our laws, and our screens, have stepped out of it. It is a comfortable story, and it is false. We are animals, primates to be exact, and everything we are today, what we feel, what we build, and what we argue about, is the result of a single evolutionary process with no internal borders.

Here is what we almost always miss: when we talk about biology, society, culture, or economics, we think we are talking about four different things. We are not. They are four names for the same phenomenon, seen from different angles. University departments, textbooks, and television debates keep them apart, but that separation does not exist in reality. It is a convenience for study, and over time it became a form of denial: if we cut the human being into pieces that never speak to one another, we never have to look at the whole, and if we never look at the whole, we never have to admit that it is an animal.

You only have to watch other species to see the resemblance. Lions cooperate within the pride: the females hunt together, the males defend the territory, and the cubs are looked after by everyone. But that cooperation ends where another group begins, and toward strangers, collaboration turns into rivalry, sometimes violent. Now think about your own life. Within the family we are generous; toward other families, more guarded. Within a country there is solidarity; toward another, suspicion appears. Researchers call this parochial altruism, and they see it in chimpanzees, wolves, orcas, and in us. It is not a quirk of our culture but a pattern of social animals. Loyalty toward insiders and wariness toward outsiders arose together, as two sides of the same survival strategy.

The same goes for our bodies. In almost all mammals, when males compete with one another, selection favors size and strength, and in humans that difference exists, though it is modest: more muscle mass, sturdier bones, a body chemistry that leans slightly more toward risk and competition. In females, pregnancy and nursing meant an enormous investment in offspring, and that left its mark on tendencies toward care and bonding. On that foundation, each society built its roles: who defended, who hunted, who raised the young. Nobody decided at a meeting that it would be this way. These were solutions that worked in specific environments, and culture polished, repeated, and passed them down. Here it is already clear that the biological cannot be separated from the social: the body shaped customs, and customs, over thousands of years, shaped in turn which bodies and which behaviors thrived.

Those roles, then, were never an imposition or a whim. They were adaptive responses by a species to the conditions it happened to live in. And for that very reason, they are not eternal. When conditions change, roles change with them, not because someone tears them down with an idea, but because they stop being necessary and others become so. It is the same mechanism that created them.

This brings us to what is singular about our species. A lion carries out its nature directly. We are so intelligent that we can imagine idealized versions of ourselves, and we tend to mistake them for what we really are. From this arises a kind of alienation from our own nature: the belief that reason can place itself above the process that produced it and dictate how it should be. But intelligence is not an exception to the animal rule; it is an extension of it. It is a survival tool that evolution gave us, and it works best when it recognizes itself as part of the system rather than trying to govern it from the outside.

And it is such a good tool that we use it to make others. First came sharpened stones and fire; later, language, agriculture, writing, money. Among all these inventions, one is remarkable precisely because it cannot be touched: the company. It is a social and legal artifact that allows thousands of strangers to work toward a common goal. Ants and bees coordinate multitudes too, but by instinct and in only one way. We invented a flexible, reprogrammable mechanism for cooperation on a massive scale. Without it, we would hardly number eight billion today. And consider what this implies: a company is at once an economic, social, cultural, and, ultimately, biological tool, because it serves the survival of a species. To try to file it under a single heading is to miss what matters most.

The economy belongs to that same family of creations, and it resembles language far more than a machine someone designed. Nobody invented Spanish or Quechua: they emerged from millions of people who needed to understand one another, and each word took hold because it was useful. The same happened with the economy. Exchange, prices, money, and markets arose as a collective construction, built decision by decision over generations, because cooperating and trading helped us survive better than going it alone. That is the insight behind the famous invisible hand: without anyone planning it, millions of individuals trying to meet their own needs end up producing an order that benefits the whole. It is not a device imposed from above, nor a trick played by a few. It is a natural expression of a cooperative species, as natural as language. And like language, it changes, adapts, and reinvents itself as the conditions of those who use it change.

When pressures change, the system changes. For millennia, the family was the basic unit of survival: it was where resources, care, and protection were shared. Today, markets, institutions, and technology perform much of that function, and that is why traditional family roles are being transformed. This is not an anomaly or a betrayal of nature, nor is it the triumph of an ideology. It is the same adaptive process as always, now running faster on the cultural level than on the genetic one, and the new roles are the species' response to a new environment.

There is, however, a widespread habit that keeps us from seeing all this: staying on the surface. Almost always, the first explanation offered for a human phenomenon is the most visible and the most convenient: someone decided it, someone imposed it, someone profited from it. It fits in a single sentence, and that is why it circulates so easily. A little deeper down lies another, more elaborate but still partial, because it lights up only one aspect and leaves the rest in shadow. The real explanation lies deeper still, in the evolutionary process that runs through biology, history, economics, and culture all at once. Most people stop at the surface layers, and not for lack of intelligence but out of mental economy: getting to the bottom takes effort, and daily life rarely demands it.

The trouble begins when a superficial explanation passes itself off as the whole truth. It happens when the change in roles is explained as a mere ideological invention, ignoring the long evolutionary process that defined them and is now transforming them; and it happens just as much when everything is reduced to biology, forgetting that culture is part of the same process. Both oversimplify, and oversimplifying is an elegant way of being wrong. Some disciplines are already building bridges, such as behavioral economics and the study of cultural evolution, though they do not yet dominate public conversation, where simple ideas travel faster than complex ones.

That is why it is worth insisting on a more integrated view, and doing so with humility, knowing that no single perspective is enough. Each discipline lights up one corner; understanding comes when we put the lights together.

In the end, the separation between the natural and the human is our own invention, a wall built so we would not have to look in the mirror. But the mirror is still there. We are animals with an extraordinary imagination, carried along by a single process that makes no distinction between genes, customs, and markets, and that is still under way, transforming us even as we discuss it.

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