150 years ago, the Metre Convention determined how we measure the world — a radical initiative for the time

150 years ago, the world agreed to a shared language of measurement. It still holds us together, even when everything else seems to pull us apart.

By: Jonathan Simone, Brock University, The Conversation

Outlets: The Conversation

Published: July 27, 2026

Words: 1,294

Last Updated: 3 weeks, 1 day ago

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By Jonathan Simone, Brock University

On May 20, 1875, delegates from a group of 17 countries gathered in Paris to sign what may be the most overlooked yet globally influential treaty in history: the Metre Convention.

At a time when different countries (and even different cities defined weights and lengths based on local artifacts, royal body parts or grains of wheat, this rare agreement among nations offered something simple yet undeniably …

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