Several historians have described the American Revolution as the “American Secession”. This is because the American Revolution was pretty tame compared to later revolutions in France and Russia. Most Americans weren’t even in favor of the Revolution, and the majority of those that were didn’t want to change their entire world… they just wanted the British to leave them alone. So after the British left, life continued for most Americans more or less as it had for decades.
Contrast this with the French Revolution, where revolutionaries railed against a millennia of rule by a theocratic monarchy. Most of France belonged to the monarchy or aristocracy, and much of the rest belonged to the church. From a revolutionary point of view, it wasn’t enough to just change their form of government. Society had to be recreated from the ground up, and certain people needed to be gotten rid of or “re-educated”. So aristocrats, bishops and priests were executed by the thousands, and their wealth and property redistributed to the working class.
But even that wasn’t enough. French revolutionaries created a new calendar to eliminate religious and monarchical days. The calendar would start not from the birth of Jesus, but from the founding of the Republic. Revolutionaries even invented a new decimal clock, partly because of its perceived ease of use, but also as another way to eliminate all traces of the Ancien Régime.
Many reforms weren’t very popular. Decimal time became the “official time” of a handful of towns, and was readily embraced by a few scientists and revolutionaries… but almost no one else. The Republican calendar was more successful, being used by the French government for 12 years. There was, however, a significant error in the calendar related to the calculation of leap years which made it mathematically inaccurate. And while many Frenchmen were at least initially more enthusiastic about the calendar than the clock, so many people had to use the Gregorian calendar so often – in business dealings with other countries, or working with dates from before the Revolution – that most just gave up and went back to the old calendar. For some reason, I’m picturing an 18th century French version of Lewis Black, complete with liberty cap: “we already had one perfectly good calendar, but invented a new one… SO WHY THE HELL DO WE KEEP GOING BACK TO THE OLD ONE? IF EVERYONE’S GONNA KEEP USING THE OLD ONE, WHY DON’T WE JUST DITCH THE NEW ONE? AM I THE ONLY SANE PERSON IN THIS REPUBLIC??” In any case, the French government agreed and went back to the Gregorian calendar in 1805.
But there was one reform that was insanely popular. It was so popular, in fact, that almost the entire world now uses it. And people in France at the time were happy to see it.
It’s the metric system.
The first unified system of measurement used in France was established by Charlemagne in AD 790. His system was remarkably similar to Britain’s “Imperial System”. For instance, the pouce was the French equivalent of the inch, and was exactly 1.066 inches. And the pied du roi (“the king’s foot”, usually just shortened to pied) was equal to 12 pounce (12.86 inches, or 1.066 feet). Thus, the pied carré (square foot) was equal to 1.136 sq ft. The toise, the French equivalent of the fathom, was 6.394 feet, compared to 6 feet in England (the English only used fathoms at sea; the French used it on both land and sea). Liquid measurements varied a bit: the chopine was equal to .84 Imperial pints (but almost exactly 1 US pint, which was the system in use in England until 1824), the pinte was 1.86 Imperial pints (or 2.01 US pints). The quade was equal to a US half-gallon (or .42 Imperial gallons) and the velte was equal to 2.01 US gallons (or 1.68 Imperial gallons).