The Mexican Revolution and the French Revolution

The French Third Republic was the first sovereign regime to last more than 18 years since 1789. The Mexican Revolution is also tricky to mark the end of because like France and as we're about to see with Russia, there is no dramatic endpoint. In Mexico presidential history it just sort of drifts from Carranza to Obergon to the PRI. It's only after the Civil War that the communist regime is actually on stable footing.