The only one that seems to have failed in the same way as the US system has failed is Hungary (Turkey had a broadly similar systemic failure, but isn't a parlia

The only one that seems to have failed in the same way as the US system has failed is Hungary (Turkey had a broadly similar systemic failure, but isn't a parliamentary republic). Now, obviously, a parliamentary democracy isn't a _guarantee_ that you won't fall into autocracy/kleptocracy (notably, the Weimar Republic was one, albeit a poorly designed one), but they do seem more resistant to it than presidential republics, where it seems to almost happen more often than not.