Interesting... I'll look deeper into it, I've also started reading this study for more info.
"It may well be that countries with many issue dimensions do purposely pick electoral systems which enable more than two parties to survive..." was an interesting quote near the end.
So essentially our voting system is set up to protect the status quo? Because it's a plurality voting system? Not to mention the wealthy elite backing two parties... I think our system is broken. o.o