Think about the last time you shook someone's hand. Maybe it was at a job interview, a first meeting, or the end of a business deal. You probably didn't think about it at all — you just did it, because that's what you do. It's one of those social behaviors so deeply embedded in American professional culture that skipping it feels almost rude.
But here's the thing almost nobody considers: why the hand? Why that specific gesture? Why not a nod, a bow, or a pat on the shoulder?
The answer takes you back more than two thousand years, and it has nothing to do with warmth or professionalism. It has everything to do with the fact that someone might be hiding a knife.
The Original Purpose Was Survival
The handshake, in its earliest documented form, was a peace signal — and a practical one. Historians and archaeologists point to ancient Mesopotamia and Greece as early sources of the gesture. Stone carvings from as far back as the 9th century BCE depict rulers clasping hands to seal agreements or mark the transfer of power. In ancient Greece, the gesture — called dexiosis — appears on funeral steles and in descriptions of diplomatic exchanges.
The key detail is the hand that was extended: the right hand. In a world where most people were right-handed, and where most people carried weapons in their right hand, extending your open right palm toward a stranger communicated something very specific. I'm not holding a weapon. I have no immediate intention of harming you. The other person mirrored the gesture, and for a moment, both parties were physically committed to showing that their weapon hand was empty and occupied.
The gripping motion that followed served a secondary purpose. By clasping the other person's hand, you could also feel whether they were concealing something — a small blade, for instance — up their sleeve. You were doing a brief, socially acceptable weapons check. The shake itself may have been intended to dislodge anything hidden in the sleeve.
This wasn't paranoia. In ancient and medieval contexts, violence between strangers — and even between parties engaged in negotiations — was a genuine and common risk. The handshake was a practical protocol for reducing that risk, not a symbol of warmth.
How It Traveled Through History
The gesture persisted through the medieval period, where it became associated with oath-taking and the sealing of agreements. Knights clasped hands to mark truces. Merchants clasped hands to finalize trades. The physical act of joining hands carried legal and moral weight — breaking a handshake agreement was a serious breach of honor in a way that simply going back on your word was not.
The Quakers played an interesting role in spreading the handshake in the English-speaking world. The religious group, which emerged in 17th-century England, rejected the elaborate bowing and hat-tipping rituals that governed social interaction among the upper classes. For the Quakers, those gestures implied hierarchy, which conflicted with their belief in spiritual equality. The handshake, by contrast, was simple, mutual, and didn't require one party to subordinate themselves to another. They adopted it as a preferred greeting, and as Quaker communities grew — including in colonial Pennsylvania — the handshake gained cultural momentum in America.
By the 19th century, the gesture had largely shed its weapon-checking origins and become a standard social ritual across American life. Etiquette guides began codifying the correct way to shake hands: firm but not crushing, brief but not limp, accompanied by eye contact. The handshake had been fully domesticated.
When COVID Briefly Threatened a 2,500-Year Tradition
In March 2020, the handshake essentially disappeared from American life almost overnight. As the pandemic spread and surface transmission became a concern, public health officials discouraged physical contact, and the default American greeting suddenly had no safe replacement.
For a while, it seemed like a genuine cultural inflection point. Op-eds appeared asking whether the handshake might finally be finished. Elbow bumps, foot taps, and elaborate air-greeting rituals competed to fill the void. Dr. Anthony Fauci suggested the handshake might not come back at all. Some workplace culture consultants began advising companies to update their professional norms permanently.
It didn't stick. By 2022, the handshake had largely returned to American professional culture, though with slightly more hesitation and occasional awkwardness. The gesture that had survived plagues, wars, and centuries of shifting social norms turned out to be resilient enough to survive a global pandemic, too.
This says something interesting about how deeply embedded certain social rituals become. The handshake no longer solves the problem it was invented to solve — almost nobody in a modern American office is worried about concealed weapons. But the gesture carries so much accumulated social meaning (trust, agreement, professionalism, respect) that it persists long after its original function became irrelevant.
The Custom That Outlasted Its Own Reason for Existing
This is actually a common pattern in how social rituals work. Behaviors get adopted to solve specific problems, and then the problems disappear while the behaviors remain — reinterpreted and reloaded with new meaning by each generation.
The handshake is a perfect example. It started as a practical security measure between strangers who might be armed. It became a tool of medieval commerce and oath-taking. It was adopted by religious communities as a symbol of equality. It got codified into professional etiquette as a marker of confidence and sincerity. And now it's so reflexive that most people perform it without any conscious awareness that they're participating in a 2,500-year-old tradition that once served a completely different purpose.
Next time you reach out your right hand to greet someone, you're not just being polite. You're the latest link in a chain that runs back to ancient Mesopotamia, through medieval marketplaces, Quaker meeting houses, and 19th-century American parlors — all the way to the moment someone first decided that showing an empty hand was the best way to say I come in peace.
The Takeaway
The handshake isn't a naturally evolved social courtesy — it's a very old solution to a very specific problem that no longer exists. What makes it fascinating is that the gesture survived by continuously reinventing its own meaning, absorbing new cultural significance at every stage of its journey. That's how the most durable social customs work: they start with a practical purpose, and they outlast it by becoming something else entirely.
