A Communist Party exists to bring about a democratic revolution and then a socialist revolution.
We're not continuing capitalism; the capitalists are.
The New Deal, the presence of labor unions, and Social Security and Medicare/Medicaid, including the civil rights revolution of the 1960s/70s.
Neither was the IWW a "failure."
Or the CPUSA during its heyday.
Or the anti-war peace movement for Vietnam.
Or NAARPR and NAIMSAL
What do you mean by revolution? Do you simply mean a "popular uprising"?
Then technically, most parties have done that to one degree or another.
1917 general strike in America almost resulted in a revolution.
Yeah, the BPP wasn't a failure.
In addition, most Western parties are still around despite fierce repression and propaganda. The org I was apart of lasted 105 years so far despite it all.
They were toppled. They literally couldn't continue their careers after that. That's a victory. The Fifth Republic has existed since then.
That was a successful revolution.
Is the Android version that bad?
But they have succeeded!
William Z. Foster joined the CPUSA. The two fledgling parties also played a role.