Another important behaviour that humans share with many animals is socialisation and collaborative action. This is observed across a wide range of species, including not just animals but also organisms from other biological kingdoms. There are many examples of this collaborative behaviour.
Cetaceans (whales, killer whales, porpoises, and dolphins) engage in social collaboration to achieve common goals, such as developing feeding strategies and defending against aggressors. A species that is particularly close to us in terms of social behaviour is the wolf. Wolves form small packs of up to forty individuals, working together for survival. Their domesticated relatives, dogs, are also highly social animals capable of interacting with many other species, especially humans, to a remarkably sophisticated degree. This is exemplified by cases where humans have been effectively adopted by dogs, such as in the myth of Romulus and Remus—the legendary founders of Rome—or in more recent historical accounts like that of Marcos Rodríguez Pantoja. Marcos lived among wolves for 11 years after his father sold him to a landowner who entrusted him to a goat-keeper, who later died. Marcos recounted:
“One day I went into a wolf den to play with some puppies that lived there and fell asleep. When I woke up, the wolf mother was cutting deer meat for her puppies. I tried to take a piece from her because I was also hungry, and she swiped at me. When she finished feeding her puppies, she looked at me and threw me a piece of meat. I didn’t want to touch it because I thought she was going to attack me, but she kept bringing it closer with her snout. I picked it up, ate it, and then she came up to me. I thought she was going to bite me, but instead, she stuck out her tongue and started licking me. After that, I was already part of the family. We went everywhere together.”
Marcos also recalled that after reuniting with his father, his father simply asked him for the old jacket he had left behind.
If we extend the concept of collaboration further to include infrastructure, we see that insects and arachnids also exhibit highly cooperative behavior, forming vast colonies. However, these types of social structures are not exclusive to invertebrates; similar cooperative infrastructure-building can be observed in birds, beavers, and many mammals that create dens. In the case of insects, some colonies function almost as single superorganisms, with specialized individuals performing specific tasks or switching between roles as needed. Other social animals, such as meerkats, also have fluctuating specialized roles within their groups, such as caring for the young or standing guard to raise alarms against predators.
For social arachnids, as well as some bird species and most den-dwelling animals, collaboration seems to be primarily focused on building communal nesting or feeding structures. However, outside of these specific activities, they tend to act as individuals.
On the looser end of social structures, we find schools of fish and herds of various land animals. These groups function as dynamic, collective entities where decisions about feeding, protection, and movement are made communally.
Expanding the concept of socialization even further, we can consider co-dependent ecosystems. In such ecosystems, plants and animals—or even plants with other plants, bacteria, and fungi—are so interdependent that they cannot be considered separate entities. Biologists refer to these relationships as symbiotic or, in cases where one organism is significantly larger than the others, as holobionts. A common example of a holobiont is the relationship between a human and their gut bacteria, whereas an example of symbiosis is lichen, which is formed by the mutualistic association between fungi and algae.
The scale of communication and collaboration in most living organisms is usually limited. For example, some ant species form supercolonies containing trillions of individuals, such as the Argentinian fire ant supercolony (Linepithema humile). These supercolonies cooperate with genetically related colonies while competing with unrelated ones, allowing them to dominate newly colonized lands by leveraging globalization. However, despite their vast numbers, their communication networks remain limited to neighboring colonies and do not extend much further.
In contrast, human collaboration is, in principle, boundless. Even in the Palaeolithic era, commercial networks facilitated the exchange of materials over vast distances—hundreds or even thousands of kilometers— with materials transported almost 200kms at least as early as 45,000 years ago. This scale of mobility far exceeded that of individual bands and their immediate neighbours. No other species exhibits such an extensive range of cooperative behaviour.
Even among our closest extinct relatives, there is uncertainty regarding the extent of their social networks. Recent genetic research has shown that a group of Neanderthals remained genetically isolated from neighboring groups—less than a ten-day walk away—for more than 50,000 years. However, this genetic isolation is not unique to Neanderthals. Studies suggest that modern humans, too, have lived in genetic isolation from neighboring communities for tens of thousands of years. For instance, the ancestors of African Pygmy foragers are believed to have diverged from other human populations around 60,000 years ago, though they intermixed more recently in several occasions.
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