[cvsh]

No, it's definitely our electoral system. FPTP fundamentally shifts a system toward two major parties, and no amount of tinkering with debates or other reforms at the margins will make third parties competitive.

Further reading: https://en.wikipedia.org/wiki/Duverger%27s_law

[philipov]

Why is it a competition for a singular explanation? Why can't both be necessary but not independently sufficient conditions? I sense a middle being excluded somewhere.