> Anyhow, can you cite any case in a capitalist democracy where a party
> kept running candidates only for local elections for decades and then
> eventually became a dominant political party?
That's not what's being suggested. The idea was to use local elections as a means of building toward larger races, and sooner rather than later--but not too soon to be successful. Jumping straight into national politics when you don't have people capable of getting elected as dogcatcher is too soon.
I also question whether that 25% success rate for Green Party candidates is real. Two of those success stories are people I personally know, one of whom definitely never ran as a Green. The other was an actual Green Party member, but he did not publicize that fact during his various races (mostly successful).
Do stealth Green candidates count as successes for Green politics? It's one thing to run stealth candidates from the right--who expects _them_ to be honest or open about their aims?--and another to run them from the left.
All the best,
John A