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How did the metric system spread, and why did people resist it?

 title: 'History of the metric system - Wikipedia'

The metric system emerged during the French Revolution as a rational, nature-based alternative to the chaotic, localized measurement systems that hindered trade and science[2][4]. Governments pushed for standardization to improve commerce and administrative efficiency, eventually leading to the global International System of Units[2][6].

However, resistance persisted due to cultural identity, the high cost of industrial conversion, and simple inertia[4][6]. This created a hybrid reality where countries like the U.S. use both systems, leading to persistent confusion in daily life, from cooking and construction to travel and retail[4][6].