Metric System Adoption (1790s-ongoing)
by Anonymous
Revolutionary France created the metric system based on natural constants. Most countries adopted it. The US, Liberia, and Myanmar are the only countries that haven't fully converted, despite Congress authorizing it in 1866.
Metric System
1799
year
Base-10, natural constants (meter, kilogram)
system
Used by 95% of world population
adoption
Global standard for science, trade, and daily life
outcome
Imperial/Customary Units
Medieval origins
year
Feet, pounds, gallons (inconsistent)
system
US, Liberia, Myanmar only
adoption
Persists in US despite metric authorization
outcome
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