Quote Originally Posted by a completely inoffensive name View Post
Divisions within American parties is not a symptom of the system, but of the culture. As your right wing parties continue to grow, your government will start to face the same issues.
The populist parties (which do not only come from the right) grow as a response to a dissatisfied electorate. The current presidential nomination process in the US shows that a two-party systems is no more safe from such dissatisfaction and the subsequent rise of populists than a multiple-party system is.

Quote Originally Posted by a completely inoffensive name View Post
Why would you want a broader view? There is no good in having the fascists and communists having a notable say in government. In fact, I would think that giving them a bigger voice only promotes further radicalization.
It should be obvious that there's more to a 'broader view' than anti-democratic political parties.

For starters, there are the two axes of the political compass: social (permissive <--> prohibitive) and economic (little state interference <--> much state interference). In order to fill out this compass, we would need 4-5 different political parties (4 wing-combinations + 1 centre).