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Are Humans Eusocial? Why Some Scientists Compare Us to Ants

Humans are obviously social. We form families, neighborhoods, cities, nations, and global networks of cooperation. But some biologists have pushed that idea even further by asking a surprisingly bold question: are humans actually eusocial?

Eusociality is described as the highest level of sociability in animal behavior. In the episode’s framing, it refers to animals that live in cooperative groups with division of labor, shared child care, and overlapping generations. That is why ants are the classic example. The provocative part is that some researchers, including entomologist E.O. Wilson, have grouped humans there too.

Not everyone agrees with that label. But even critics agree on the bigger point: human beings are intensely social animals. That raises a fascinating issue. If humans are not eusocial in exactly the same way as ants, why do some scientists think the comparison is useful at all?

Humans are highly social by nature

Humans, along with bonobos and chimpanzees, are highly social animals. That matters because it suggests that the basic ability to form societies is deeply rooted in human nature. A society is more than just a crowd of people. It is a pattern of persistent social interaction, shared expectations, and institutions that organize how people live together.

Those expectations are often called social norms. Social norms are shared standards of acceptable behavior. They can be informal, like everyday customs, or formal, like rules and laws. They help explain why societies are not random collections of individuals. People learn roles, duties, and expected patterns of behavior, and these roles help hold larger social systems together.

Human society is especially notable for being both complex and cooperative. People do not all do the same things. Instead, they specialize. Different members of a group take on different tasks, creating a division of labor. In simple terms, labor specialization means that some people focus on one kind of work while others focus on another, allowing the whole group to do more than any one person could do alone.

That is a major reason the eusocial comparison is so tempting.

What makes humans seem “ultra-social”

The case for calling humans eusocial usually centers on a handful of distinctive traits.

One is cooperation. Human societies show very high levels of cooperation, far beyond what many animal groups display. Another is the parental role of males, which stands out when humans are compared with bonobos and chimpanzees. Human societies also rely heavily on language, which allows people to create shared meanings, coordinate behavior, and pass knowledge across generations.

Then there is labor specialization. Human groups regularly divide tasks among different people and social roles. Some individuals grow food, others teach, trade, govern, heal, build, or make tools. In larger societies, this specialization becomes even more elaborate.

Another striking feature is the human tendency to build what have been described as “nests” in the form of multigenerational camps, towns, or cities. That phrase captures something important: humans do not just gather temporarily. They create durable places where generations overlap, cooperate, and transmit culture.

Put these traits together and the comparison to eusocial insects begins to make more sense. The label is not just about being friendly or group-oriented. It is about unusually intense, organized, and sustained cooperation.

Why the ant comparison is controversial

Calling humans eusocial is still debated. Some biologists accept the category, while others reject it. The disagreement itself is important because it shows that scientific labels are not always clear-cut.

Part of the tension comes from the fact that human societies are extraordinarily complex. They are shaped not only by biology, but also by culture, institutions, technology, economics, and politics. Human beings do not simply follow fixed patterns. They create society, and society in turn shapes them.

This back-and-forth relationship has long interested sociologists. Some theories emphasize how social roles and institutions work together to create stability. Others focus on conflict between groups and classes. Still others examine how individuals use language and shared symbols to build social reality in everyday life. All of these approaches suggest that human cooperation is not just instinctive. It is also structured, interpreted, negotiated, and sometimes contested.

That makes humans harder to classify neatly than ants.

Cooperation lets humans do what individuals cannot

Even if the eusocial label remains disputed, it highlights something undeniably powerful: collaboration allows humans to solve problems that would be extremely difficult alone.

Societies enable members to benefit in ways that isolated individuals often could not. Through cooperation, people share food, knowledge, defense, child care, and tools. They create institutions, laws, customs, and systems of exchange. In many societies, this cooperation becomes so extensive that whole populations can be supported by specialists who do not directly produce food, such as educators, craftspeople, merchants, or religious figures.

This is one reason human society has such depth. The more stable the surplus of food and resources, the more room there is for specialization. And the more specialization develops, the more interdependent people become. A person in a complex society relies on countless others, most of whom they will never meet.

That level of mutual dependence is one of the strongest arguments for treating humans as an extreme case of social living.

The evolutionary idea behind it

One explanation for why humans became so social is that group living may have evolved because it improved survival in difficult environments. Some researchers suggest this may have happened through group selection.

Group selection is the idea that natural selection can favor traits that help groups survive, not just traits that benefit single individuals. In harsh physical environments, groups that cooperated effectively may have had an advantage. If working together improved defense, food sharing, child rearing, or adaptation to danger, then highly social tendencies could have been favored over time.

This does not end the debate, but it explains why the eusocial idea keeps resurfacing. It offers a way to think about how extremely cooperative behavior might emerge when survival depends on the group.

Human society is more than biology

Biology may help explain why humans are social, but it does not explain everything about how societies function. Human societies differ enormously from one another.

They vary by technology, economy, forms of government, kinship systems, and gender roles. Some are pre-industrial, where food production through human and animal labor dominates. Others are industrial, centered on machines and mass production. Still others are post-industrial, where information and services become more important than manufacturing goods.

These differences matter because they shape how cooperation is organized. In small hunter-gatherer groups, social life tends to be relatively egalitarian, and leadership may depend more on influence than formal office. In pastoral and horticultural societies, food surpluses and specialized roles begin to expand. In agrarian societies, larger food supplies support towns, trade, and strongly stratified social classes. Industrial societies transform labor again through factories, urbanization, and rising productivity. Post-industrial societies increasingly revolve around information, knowledge, education, health, and finance.

If humans are unusually social, they are also unusually flexible in how social life is arranged.

Social roles, symbols, and shared meanings

Another reason human societies stand apart is that they are built through meaning as well as cooperation. Symbolic interactionist theory focuses on this point. It studies how people use shared language to create common symbols and meanings, and how those shared meanings shape behavior.

This matters for the eusocial question because human cooperation is not only practical. It is symbolic too. People act within systems of identity, expectation, and interpretation. They understand family roles, work roles, political roles, and cultural roles partly through shared language and social scripts.

The sociologist Erving Goffman even used a theater metaphor, suggesting that social roles provide scripts that help govern interaction. In this sense, humans do not simply cooperate mechanically. They perform, negotiate, and reinterpret cooperation in everyday life.

That makes human sociality both powerful and complicated.

The deepest point of the debate

So, are humans eusocial?

The strongest cautious answer is this: some biologists say yes, others disagree, but nearly everyone agrees that humans are among the most social and cooperative animals on Earth.

The reason the term continues to attract attention is that it shines a spotlight on what makes human society extraordinary. Humans cooperate across generations. They divide labor. They share child care. They build enduring settlements. They create norms, roles, institutions, and systems of meaning that allow very large groups to function. And in difficult environments, that cooperation may have been a survival advantage.

Whether “eusocial” is ultimately the right technical label or not, the question is useful because it forces us to notice how unusual human social life really is. We are not just individuals living side by side. We are participants in layered systems of cooperation that shape who we are from birth onward.

That may be the most important takeaway of all: humans do not merely live in society. In a profound sense, society helps make humans human.