Remind me again how democracy actually spread around the world in the past 200 years

I'm not even defending democracy, it has been looking worse to me recently, but... if democracy gives even a slight advantage in quality of life/human development over a bad autocracy that would've been likely to exist in its stead, then, utility-wise, even the bloodiest wars/revolutions that brought said "democracy" to a country must've been worth it! (E.g. a democratically imposed land reform that lifts the peasants out of poverty could easily be worth killing 0.1% of the population.) Or are you trying to pin even the general destabilization of the world order on democracy too?

(Genocides, etc committed by a democracy are not an argument, unless you can argue that a counterfactual autocratic regime wouldn't have done the same or worse.)