Connection Is Not a Preference. It Is a Biological Requirement.

We are biologically wired to be social

Matthew Lieberman’s neuroscience research shows that the brain’s default mode network, active whenever we are not focused on a task, is a social thinking system. In fact, the  brain uses its downtime to simulate relationships and social scenarios. We are social to our core, and this is built into our biological programming as a species.

Social pain, be it rejection, exclusion, ostracism, humiliation or other forms of negative social experiences, activates the same neural circuits as physical pain. Chronic social exclusion triggers the same stress responses as physical threat; the body cannot distinguish between being chased by a predator and being cut off from the group.

Conversely, being close and connected to others has great positive effects on our experiences and wellbeing, not to mention our performance. For example, oxytocin (a natural hormone and neurotransmitter which is released through physical proximity, eye contact, and shared laughter), reduces stress and strengthens trust in others.

The brain treats social disconnection as a threat to survival.

Research assembled over the past two decades by scientists including Matthew Lieberman, John Cacioppo, and their colleagues shows that social connection is not a preference human beings happen to have, like a fondness for natural light or ergonomic chairs. It is a biological requirement, as fundamental as food and water, wired into the architecture of the brain and the chemistry of the body at the deepest structural level.

The Social Brain

Matthew Lieberman’s 2013 book Social: Why Our Brains Are Wired to Connect opens with a finding that should be more widely known than it is. When the human brain does not “power down” when it is not engaged in a specific task (in the idle moments between one cognitive challenge and the next). Instead, in these moments of spare capacift it it activates a network of regions that neuroscientists call the “default mode network”. And what the default mode network does, consistently, is think about other people. That’s it.

In other words, when we’re not specifically focusing on a task, we default to thinking about people and our social connections and relationships. We use our spare capacity, by default to do things like simulate social scenarios, replay interactions, imagine future conversations, model other people’s thoughts and feelings, process the status of relationships, considers who can be trusted and who cannot, etc. Our default state is social cognition.

This is not an accident or a quirk of evolution. Lieberman argues that it reflects the evolutionary priority that social intelligence has held for the human species. For most of human history, getting social relationships right was a survival-critical activity. Knowing who was trustworthy, who could be relied upon in danger, how to navigate the complex hierarchies and alliances of group life were the skills that determined whether you lived or died. The default mode network is the brain’s ongoing investment in those skills, maintained even when no immediate social challenge is present.

The implication is profound. We do not merely use social capacity when required. We are continuously, neurologically, in the business of social relationship. The brain is not a problem-solving machine that sometimes engages with people. It is a social organ that sometimes solves problems. This distinction matters enormously for how we think about the place of human connection in working life and in wider life.

Pain Is Pain

One of the most striking findings in social neuroscience is the neural equivalence of social and physical pain. When someone experiences physical pain, like the sharp sensation of a burn or the ache of an injury, specific brain regions are activated, including the dorsal anterior cingulate cortex and the anterior insula. These regions are central to the experience of pain as distressing, as something that demands attention and response. This is a signal that the future does not look positive and that we should take corrective action.

Lieberman and his colleague Naomi Eisenberger conducted a series of studies using a simple virtual ball-tossing game called Cyberball, in which participants were gradually excluded by the other (computerised) players. The brain scans showed that social exclusion activated the same dorsal anterior cingulate cortex and anterior insula as physical pain. The experience of being left out, rejected, or excluded registers in the brain’s pain architecture in a way that is neurologically indistinguishable from physical hurt.

This finding reframes what exclusion, ostracism, and social rejection actually are. They are not merely unpleasant. They are, at the level of neural processing, painful. The brain responds to them with the same urgency and the same disruption to normal functioning that physical pain produces. A person who is being excluded from a team, ignored in meetings, or gradually pushed to the margins of an organisation is not experiencing simply a bruised ego. They are experiencing pain.

Though this might seem a bit strange, it makes perfect sense when one thinks of pain as being a signal of negative future outcomes.

The Stress of Exclusion

The neural equivalence of social and physical pain connects directly to the work of John Cacioppo on the biology of loneliness. Cacioppo’s research demonstrated that the body’s threat-response systems are activated by social exclusion in the same way they are activated by physical danger. When this happens Cortisol levels rise, inflammatory markers increase, the immune system is suppressed and the cardiovascular system is stressed.

Cacioppo explains that the body cannot meaningfully distinguish between being chased by a predator and being excluded from a group. Both register as survival threats and both activate the same emergency physiological response. The stress response evolved to handle physical danger, but because social connection was so critical to survival in the environment in which human beings evolved, the system became equally sensitive to social threat.

The practical consequence, for people who experience persistent social exclusion is chronic physiological stress. This is the sustained, low-level, damaging stress of an organism that believes, at a biological level, that it is in danger. The health consequences of this are well documented: cardiovascular damage, immune suppression, sleep disruption, cognitive decline.

What Oxytocin Does and Doesn’t Do

Oxytocin is a neuropeptide released in the brain and body through physical proximity, touch, eye contact, shared laughter, and synchronised physical activity. Its effects are wide-ranging and important: it reduces cortisol levels, dampens the stress response, increases feelings of trust and safety, strengthens immune function, promotes prosocial behaviour, and deepens the sense of connection to others.

The oxytocin system is, in effect, the body’s biological infrastructure for belonging. It is the mechanism through which genuine social connection translates into physiological benefit. When we say that social connection is good for health, oxytocin is a significant part of the mechanism through which this happens. Oxytocin is released through the specific channels of in-person interaction like physical co-presence, eye contact, shared laughter, etc.

When we spend real time with real people in real life, oxytocin is released. When we spend time remotely, virtually with people or watching videos on our phones, we don’t reliably trigger the release of oxytocin. So while we might get some sense of connection through these activities, we don’t actually generate the biological responses that lead to physical and mental benefits associated with real connection.

Why This Matters for How We Design Work

The neuroscientific picture assembled from Lieberman, Cacioppo, Eisenberger, and the broader literature on social cognition and oxytocin has concrete implications for how work should be designed.

If social exclusion activates the pain system, then the management practices that produce it like the cliques that form in leadership teams, the informal networks that systematically exclude certain people, the cultural norms that make some employees feel invisibly peripheral are not merely unfair, they cause measurable harm. A colleague who rarely speaks in meetings because they have learned their contributions will be ignored is not being oversensitive, their brain is registering pain, and the chronic activation of the pain system in this way has the physiological consequences of chronic stress. Ultimately this damages health and performance.

Of course, we’re not super naive on this. Pushing one person out of a group can help bring the rest of the group stronger. It can bring power to certain people. It can boost the social status of some people. So while we shouldn’t do things like this, there is an appeal to demeaning others as it can boost us and our sub-tribe. And we suspect that some of these actions increase our own sense of the positive of our future, and that makes these actions alluring. In other words, it might not be that easy to stop people socially hurting other people.

It’s also worth noting that if oxytocin requires in-person interaction, then decisions about where and how work happens have direct biochemical consequences for the depth of connection that employees can form with one another. The hybrid working debate is not only a productivity debate or a work-life balance debate. It is, in part, a question about what kind of social bond (and thus what quality of physiological wellbeing) the working environment is making possible.

The People Shift View

Our view is that the research on the neuroscience of belonging is probably is compelling evidence for the fact that human connection is not a luxury in life, but a necessity for a good life. At an individual level connections and relationships produce numerous positive neurological and physiological benefits. They should be high on our priority lists. 

From a work perspective, we believe there are great benefits to creating psychologically safe and inclusive working environments that minimise social pain within groups. This improves the capability of individuals to perform well, reduces stress and increases wellbeing. In theory we should do more of this, but the practice is hard. Sometimes things happen and people need to be upset, for example when they learn that they are underperforming. 

Overall we think we should design work with aim to minimise net human suffering, but we very much acknowledge this can be hard in practice.

Learning More

To go deeper, explore these resources on people-shift.com:

• Wellbeing
• Subjective Wellbeing
• Employee Engagement
• Bowling Alone
• Dunbar’s Number