Ten years after the French revolution the country was governed by Napoleon, who seized power in a coup d'etat...although he turned out to be substantially more liberal than the revolutionists.

Between "revolution" and "democracy" lies a lot more mess than people remember. There is quite frequently a counterrevolution or collapse followed by another revolution. The revolution necessarily interrupts services which may be keeping people alive.

The UK's civil war established a theocratic military dictatorship. The 'glorious revolution' installed not a republic but a constitutional monarchy with a Protestant king subject to the rule of Parliament. Electoral democracy followed later, piecemeal.

France and the US have more parallels: first revolution in late 1700s, delivering either incomplete or non-lasting freedom; eventually another revolution in the late 1800s, establishing more freedom; final formal abandonment of colonialism/slavery round about 1968. Hmm, that rather implies that the timetable for the next one is somewhere around 2070.

To be perfectly fair I think that, at least in the U.S., it's more fair to say that the "revolution" occurred even before the first British troops had landed, and was as nearly bloodless as it might be possible to be. The bloodshed came when British tried to regain control over a country already lost to the revolution.

yes, several hundred years ago when people had morals to build democradic societies with an obligation to the good of the people. now you just have money and weapons thrown around for the intention of power control.