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Visualized: The 5,000 Year History of Salt

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8 hours ago

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September 10, 2026

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By

Cody Good

Graphics & Design

  • Zack Aboulazm
  • Akhila Ayyalasomayajula

The following content is sponsored by Atlas Salt

View the full-size version of this graphic

Visualized: The 5,000 Year History of Salt

Key Takeaways

  • Salt has been in demand for 5,000 years, shaping food preservation, trade, language, chemistry, exploration, public health, and infrastructure.
  • Today, salt has more than 14,000 documented uses, with road de-icing standing as its largest modern market.

Salt is one of the world’s oldest essential commodities. For 5,000 years, it has shaped how civilizations preserved food, built trade networks, powered industries, and managed public infrastructure.

This graphic, sponsored by Atlas Salt, visualizes the 5,000 year history of salt using information from Salt: A World History by Mark Kurlansky.

The Mineral That Built Civilization

The history of salt begins with some of the world’s earliest civilizations. By around 3,000 BCE, salt was being harvested in China and Egypt. By 252 BCE, workers in China were drilling brine wells more than 300 feet deep, and by 200 AD, China was using natural gas to process salt.

Era Timeline Salt Milestone
Ancient Era ~3,000–200 BCE First salt harvesting in China and Egypt
Ancient Era 700–450 BCE Celtic salt producers introduce cured ham to Western food culture
Ancient Era ~200 BCE Roman salt use shapes words like “salary” and “salad”
Classical Era 9th–11th Century Salt chemistry helps lead to gunpowder
Classical Era 875–1400 Salt cod supports long Atlantic voyages and ocean exploration
Medieval & Early Modern Era 13th Century Venice and the Hapsburgs capitalize on salt for political power
Medieval & Early Modern Era 14th Century Salted food becomes essential to feed armies
Medieval & Early Modern Era 16th Century Deep shaft mining expands at Poland’s Wieliczka salt mine
Industrial Age 1807 Sodium is first isolated, helping lay the foundation for modern chemistry
Industrial Age 1830s Canning reduces salt’s role in food preservation
Industrial Age 1901 Spindletop launches the oil age after drillers strike oil near a salt dome
Industrial Age 1910 Refrigeration further weakens salt preservation demand
Modern Market April 1930 Gandhi’s Salt March becomes a major moment in India’s independence movement
Modern Market Mid-20th Century Iodized salt becomes a public health tool
Modern Market 20th Century–Present Salt caverns are used for the U.S. Strategic Petroleum Reserve
Modern Market Present Day Road de-icing becomes salt’s largest modern market

Source: Salt: A World History by Mark Kurlansky

Salt’s influence even shows up in language. Words like salary, salad, sausage, and sauce can all be traced back to salt, showing how deeply the mineral became embedded in daily life.

From Preservation to Infrastructure

For centuries, salt’s most important role was food preservation. Salted meat and fish helped feed armies, support long voyages, and expand trade across continents.

But salt’s role changed as technology evolved. Canning and refrigeration reduced its dominance in food preservation, while modern chemistry, energy, and infrastructure created new uses.

Today, salt is used in thousands of applications. Its most visible modern market is road de-icing, where governments and transportation agencies rely on it to keep highway driving safer during winter.

Salt’s Enduring Demand

Salt has been in demand for 5,000 years and has more than 14,000 documented uses. Today, it remains essential to North American road de-icing, a recurring, government-funded infrastructure market with few scalable substitutes.

Atlas Salt is developing the Great Atlantic Salt, a major salt project in Newfoundland and Labrador, positioning the company within one of the world’s most durable commodity markets.

Read the Investor Guide to learn more about Atlas Salt’s opportunity

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