Germany came into being in 1871, and was in essence a monarchy until 1918. The Weimar Republic was its first attempt at a proper democracy, and it included an explicit "in case of emergency, we can revert back to totalitarianism" clause. It was a democracy with a giant built-in escape hatch - which as we all know was immediately used by a certain Austrian painter to turn it into a dictatorship.

Germany's first two constitutions quickly failed because they weren't democratic enough. The US constitution - despite its obvious flaws - has somehow managed to make it 250 years without causing huge issues, but it is now becoming quite clear that there should probably be a revision to prevent another giant mess like the current one from happening.