About 3.5%.

Human tears are 0.9% sodium chloride — the same as human blood, which is the same as the amniotic fluid a baby floats in for nine months before being born. Seawater is about 3.5% salt across the broader ionic composition. There’s variation, of course, across life stages and body compartments. But the pattern is undeniable: the water that runs through us is made of the same chemistry as the water we came out of.

Which is not metaphor.

Roughly 3.8 billion years ago, in the shallow oceans of an early Earth, single-celled organisms figured out how to keep the ocean inside themselves — a membrane, a boundary, a skin. That skin was a little bubble of saltwater in a bigger body of saltwater. Over billions of years, those bubbles got bigger and more complex, built spines and nervous systems, crawled out onto land, and eventually grew up to be you.

You are a walking sea creature with delusions of dry land.

Every cell in your body is bathed in a solution that is chemically trying very hard to be a little ocean. The only reason you don’t dry out and die instantly on a beach is that your skin keeps the ocean in. Crying is not a metaphor for grief. Crying is the ocean briefly escaping through your eyes.

You never left the water. You just carry it now.

The Stuff That Paid Roman Soldiers

The Romans paid their soldiers in salt.

They called it salarium. That’s where the word salary comes from. A man’s whole wage was a ration of salt — because salt was the only thing that could preserve food in bulk, and preserved food was the difference between armies eating and armies starving. Salt was pay. Salt was power. Salt was what empires ran on.

Gandhi knew this. In 1930, he walked 240 miles to the Indian Ocean to pick up a handful of salt from the beach. Just salt. A pinch. But the British had made it a crime to lift that pinch — they had a government monopoly on the substance and levied a tax on it. So Gandhi’s pinch was theft. A theft of what the ocean was already giving away for free.

A pinch of salt ended the biggest empire on the map.

Think about that. Not a bomb. Not a coup. Not a nuclear weapon. A handful of something your body is already 3.5% made of, from an ocean that makes no distinction between who touches it. That was the accelerant. The fire had already been lit by the time Gandhi bent down. His crime was just picking up what was his to begin with.

The Taste Of A Border

Every immigrant story is a salt story.

The Irish crossed salt water in coffin ships. The Italians crossed it in steerage. The Senegalese crossed it in chains. The Chinese crossed it in secret. The Vietnamese crossed it in boats barely big enough to carry them. The Syrians crossed it in 2015 with their phones wrapped in plastic bags. The Cubans crossed it on rafts made of inner tubes. The Haitians, the Mexicans, the Cambodians, the Rohingya, the Eritreans — all of them crossed salt water.

And what ends every immigrant story, if they survive, is the tears of whoever was waiting for them or whoever had to stay behind. The ocean that carried them and the tears that measured them were chemically indistinguishable.

This is why diaspora music is salt music. Cape Verdean morna. Portuguese fado. Delta blues. Greek rebetiko. Israeli mizrahi. Every genre the ocean ever moved has the same flavor — because the flavor is literal. The tears of the people who left and the water that moved them are the same substance.

The ocean that separates people is the same ocean that is already inside them, weeping.

My Grandfather’s Hands

My grandfather worked on a fishing boat. He came home every night smelling like the sea he’d ridden. His hands were cracked from rope and brine. He said this salt is mine — meaning he’d earned it, meaning it had earned him back, meaning the ocean and his hands had the same problem: too much work, not enough softness.

My grandmother cured pork in a cellar. She wiped her hands on a flour-sack apron. She said salt is how we keep the meat. Salt is how we keep our people.

Every culture on Earth has a word for break bread — the ritual of sitting down to eat with another human. And nobody ever broke bread without salt. That’s not an accident. That’s the oldest contract: I sit at your table, I share your salt, therefore we are people to each other now. If you want to know whether a human is your people, find out if they’ll share salt with you. That’s the test. That’s older than every law.

The Song

Salt is a sea shanty at the start and a gospel organ at the end. It threads through Delta blues and Cape Verdean morna and Mediterranean accordion. The central hook is just: “salt in the ocean, salt in the blood / salt in the tears of the ones we loved / salt in the bread, salt in the wound / salt in the sweat of the work we do.”

I wrote it for every person who has ever worked with their hands. Fishermen, farmers, sharecroppers, line cooks, dockworkers, curers, miners, mothers, nurses, cleaners, carriers. The 3.5% isn’t just what you are — it’s what you give. Every time you sweat, every time you cry, every time you bleed, you’re handing the world back a little of the ocean it loaned you.

No part of you was ever dry land. You were always sea.

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Next Monday: The Wedding Song For Everybody. Every wedding on Earth has a circle dance.