[timeon]

That was probably mentioned from US-centric point of view where they have two-party system.

[magicalhippo]

I'm from Norway where we have currently ten parties in our parliament[1].

We still mostly talk about them as distributed along a left to right axis. Though as I mentioned it's not a perfect approximation.

[1]: https://en.wikipedia.org/wiki/Storting

[timeon]

Seems like Norway has also many constituencies which can favor dominant parties. However unlike US you have also leveling seats which balances it a bit.