What, multipolar politics, like modern Germany or Sweden or Australia? Wealthy, socially progressive countries with high standards of living?
You're just spreading FUD. PR was one of a great many factors involved in the rise of Hitler, but keep in mind that the US system also let a president get elected that didn't win the popular vote, who then went on to destroy a foreign country to drum up domestic political support. Literally hundreds of thousands of people died in Iraq to make Bush more popular in the US, despite Iraq having nothing to do with threats to the US. But it would be stupid to say that the US electoral system was directly responsible for the Iraqi bloodbath.
And as I say in the other comment, there are a shitload of countries using PR that aren't fascists.
Modern Germany does not have PR. For good reason.
" PR was one of a great many factors involved in the rise of Hitler, but keep in mind that the US system also let a president get elected that didn't win the popular vote"
The U.S. President has never been elected by popular vote. Again, for good reason. Feature, not bug.
You think it's bad with two parties who can't agree on anything? Try twenty parties who can't agree on anything.
"Ah, you're just trolling."
No, I certainly am not trolling. The multitude of parties in the Weimar Republic, which could not form an effective government for two entire election cycles, were directly responsible for Hitler's rise to power.