I know this is an impossible question, the future is chaos, but we can at least identify and discuss some key factors.
When I say "successful leftist revolution" I mean one that happens soon enough to prevent, or have non-negligible odds of preventing, the collapse of human civilization as we know it due to climate change.
In all likelihood I think we're fucked as far as climate change is concerned, but we should still try to improve our odds. There's no prize for correctly predicting that we're fucked.
I honestly disagree. A Trump loss would make the right more dangerous and deranged than it is even now.
...oh man, that does sound plausible.
What about state opposition?
state will always oppose the left. literally always.