If relational tensions show us what happens between two people, there is an even broader level at which our relational life is shaped: that of the group, of society, of the collective dynamics we absorb without requesting them and without fully becoming aware of them. We touched on this subject earlier in this blog, but it deserves deeper exploration, because social influence is far more subtle and pervasive than we usually understand it to be.

When we talk about social influence, our minds go immediately to explicit pressure: someone telling us what to do, what to believe, how to behave. But genuinely powerful influence almost never works that way. It operates below the threshold, in silence, through mechanisms we have internalised so thoroughly that we have confused them with our own will.

Influence through group identity

One of the most powerful mechanisms of social influence is the need to belong. This isn't a weakness; it is a fundamental biological need. The human brain is a social organ, built to function within a group. Social exclusion activates the same neural circuits as physical pain, as demonstrated through neuroimaging studies by Naomi Eisenberger at UCLA.

The direct consequence is that we adjust our behaviour, opinions and even values in order to remain inside the group. Not through conscious decision, but through an automatic process of social calibration. We adopt the group's humour, its language, its attitudes towards certain subjects. And gradually, we come to believe these are our own.

This explains why people who change social environments, who move to another country, who enter a new professional circle or who exit a long relationship, often report a sensation of rediscovering themselves. Not because they changed fundamentally, but because they stepped out from under the influence of a specific social field and can see more clearly again what is theirs and what belonged to the group.

Emotional contagion

Another mechanism, less discussed, is emotional contagion. Emotional states are transmitted between people not through words, but through extremely subtle nonverbal signals: facial microexpressions, tone of voice, breathing rhythm, body posture. The brain captures these signals and processes them before the conscious mind has time to intervene.

Research by Elaine Hatfield, who developed the concept of emotional contagion, shows that people automatically and involuntarily absorb the emotional states of those around them. If you spend time with an anxious person, you become more anxious. If you are in the presence of someone calm and stable, your nervous system will tend to regulate itself accordingly. This is not conscious empathy; it is an automatic biological synchronisation.

The implications for relationships are significant. We are not independent emotional entities that interact occasionally. We are open systems that influence each other continuously. The emotional field of a couple, a family or a group of friends is a collective reality, not the sum of individual states. And if that field is chronically anxious, chronically low or chronically agitated, it affects every person within it, including the one who "has no personal problems."

The halo effect and how we perceive others

Social influence also shapes how we perceive others, often with serious consequences in relationships. The halo effect, initially described by psychologist Edward Thorndike, describes the tendency to extend a positive or negative quality of a person to all other aspects of who they are.

If someone makes an excellent first impression, we will tend to attribute to them competence, integrity and kindness alike, regardless of subsequent evidence. Conversely, a negative first impression contaminates all the interactions that follow. In long-term relationships, the halo effect becomes more complex: if partners have built a strong positive image of each other at the outset, that image can function as a shield filtering inconvenient information later. But it can also work in the opposite direction: if something has damaged the overall image, every neutral behaviour of the other person will be interpreted through that negative filter.

Awareness of this mechanism is concretely valuable. When I notice I have a strong reaction towards someone, positive or negative, I ask myself: am I reacting to the person in front of me, or to the projection I have constructed over them?

Normalisation through repeated exposure

One of the most insidious mechanisms of social influence is normalisation through repeated exposure. Things to which we are continuously exposed become, over time, normal to us, even if they would initially have seemed unacceptable.

This works in relationships just as implacably as in society at large. A partner's behaviour that, at its first appearance, would have troubled you deeply becomes acceptable after it repeats often enough and after you have found enough justifications for it. Not because it has become less problematic, but because your threshold of normality has shifted gradually.

The phenomenon is known in psychology as hedonic adaptation when applied to positive states, but it works identically in the negative direction. You can grow accustomed to a lack of respect just as easily as you grow accustomed to comfort. The difference is that growing accustomed to a lack of respect slowly and steadily erodes your self-esteem and your relational standards.

Social influence and the authentic self

What I find most challenging in this entire discussion about social influence is that there is no "pure self" completely unaffected by context. We are, in part, the product of the relationships and groups we have moved through. And that is not a failure of authenticity; it is the human condition.

But there is a real difference between being shaped by social experiences and being entirely subsumed by them. What makes the difference is reflection. The capacity to ask yourself periodically: what do I actually believe about this? What am I choosing, rather than my group choosing for me? Where have I adopted a standard that isn't mine? What behaviours have I normalised that, viewed with fresh eyes, shouldn't be normal?

These questions have no simple answers and nor should they. But the act of asking them is, in itself, a healthy form of resistance to unexamined influence. It is the difference between living reactively, shaped by forces you cannot see, and living with a genuine degree of choice.

Social influence doesn't disappear once you become aware of it. But it loses its invisible character. And a visible mechanism can be examined, evaluated and, when necessary, refused.

Think of three beliefs you hold about what a relationship should look like or how you should behave within one. Where do those beliefs come from? Are they genuinely yours, or did you absorb them from a social context you haven't examined in a long time?