First, some clarifications and quibbles.
- I’m not aware of any democracies since Ancient Greece and, according to the record, it wasn’t good.
- Democratic republics (the thing that we’re actually talking about) have only existed since the very end of the 18th century so we don’t really have much history to compare over.
- Which places are a “democratic republic” and which aren’t is a bit subjective. There are probably some nations that currently are, on paper, a democratic republic that pretty much any political scholar would raise an eyebrow up to the moon at, and many more of that ilk through the last two hundred years. Sorting them would be a hell of a task.
But, almost certainly, there have been some moments when the authoritarians did better. When the US was formed, we were a fairly poor country and I’m not sure when we actually passed by the top Authoritarian nation in terms of quality of life.
When the first French Republic formed, it was a disaster. That said, I’m not sure how much the quality of life backslid - from the metric system, I know that science was ongoing during that time, so maybe things kept on mostly-as-normal, other than the murders?
To quote from this paper:
Between 1946 and 1999, one in every twenty-tree presidential regimes died (that is, became a dictatorship), whereas only one in every fifty-eight parliamentary regimes died.
I’d suggest that, probably, most of those nations that failed did not surpass the best authoritarian nation at the moment.
But, in the long view, so far democratic republics have done better. Authoritarian nations that have caught up or nearly caught up have almost always succeeded largely by integrating the technological developments of the democratic republics and, as such, trailed them and not surpassed.
That said, most technology doesn’t affect the home. Space lasers aren’t a component of quality of life. If an authoritarian country has modern cellphones, microwaves, dishwashers, etc. lower crime, a better diet, etc. then it’s arguable that they’re better.
It’s quite possible that were it not for weather/climate differences and population density, some authoritarian nations of the moment would be at or above much of the US and Europe.
Personally, I’d argue that the democratic republics need to perform an upgrade to our systems - taking what we’ve learned over the last two centuries about how our systems fail, and instituting measures to prevent them - so that we stay competitive. Authoritarians are advertising their greatness and the view from the ground, in most regions, isn’t that bad. Scary stories of tyranny aside, a lot of these places just feel like ordinary daily life, with cleaner streets and friendlier people than you get in the West.
We only win on consistency. The authoritarians will, eventually, get a bad leader who trashes everything or a good leader who gets too confident in his own greatness and ruins everything. In the long view, democratic republics are better. But if you’re relying on the long view to sell your average citizen, I’d greatly reconsider that outlook.