There are lots of contradictions in the brain. Especially with neurotransmitters … like oxytocin.
Somewhere between the laboratory and the lifestyle pages, this modest peptide acquired a flattering nickname: the love hormone.
Oxytocin, we were told, was the chemical essence of the maternal embrace, the lover’s gaze, the reassuring squeeze of a hand. If humanity could only get an extra spritz of the stuff, universal fellowship might follow.
The biology is less comforting.
Yes, oxytocin can encourage trust, generosity, and empathy, but these effects depend heavily on context. It does not simply make us love; it helps tell us whom to love. Toward people already admitted to our circle, it may deepen attachment.
On the other hand, confronted with outsiders, the same bonding machinery can reinforce suspicion, exclusion, and defensive aggression. Oxytocin can encourage hate.
Oxytocin is not so much the love hormone as the circle hormone.
The human brain is an industrious maker of circles. It sorts the world into male and female, native and foreign, believer and infidel, Collingwood and Carlton. Us vs Them. It can begin making such distinctions in a fraction of a second, well before conscious reason has located its spectacles.
By the time we believe ourselves to be carefully assessing another person, older neural systems may have already stamped the file: safe, dangerous; familiar, strange; ours, theirs. Consciousness often arrives afterward to prepare the press release.
This sounds discouraging until one considers how comically easy the categories are to rearrange. A face that registers as foreign can become reassuring when placed beneath the cap of a favored team. Strangers become comrades when they sing the same anthem, endure the same storm, or discover a shared enemy. At weddings and funerals, political rallies and football matches, ritual draws the circle in thick ink. The boundary may feel ancient and sacred even when it was invented shortly before kickoff.
Our tribal reflex, then, is deep but not fixed. A Them can become an Us.
Culture can narrow the circle with flags, slogans, humiliations, and warnings of contamination. Modern media have made a business model of this talent. An algorithm need not understand prejudice; it needs only to notice that indignation keeps us looking. Again and again it whispers that our people are threatened, our values mocked, our place in the world stolen. The nervous system supplies the rest.
Yet the flexibility that permits manipulation also permits escape. The task is not to abolish belonging. Humans require loyalties, affections, and homes. It is to notice where empathy stops—and then redraw the border. To widen the circles. Family can widen into neighborhood, neighborhood into nation, nation into humanity.
The useful pause is almost embarrassingly small:
What category has my brain just assigned?
What evidence do I have?
What would change if this person were inside my circle?
Oxytocin may bond the tribe. Thinking can enlarge it.