I don't know about that. From what I have observed, revolution tends to lead to tyranny. Such as the Arab Spring, the Russian and French Revolutions, etc. But gradual effects through protest and using the existing democratic structure do have a positive long-term effect.

For example, the shift to the left in the UK during the 19th (the Tories ended up adopting Gladstone's position.) We might be beginning to see some kind of move to the left in US democratic policies because of long-term gradual pressure from Sanders and others like him.

Matched with protest and organization of labor, and gradual changes in favor of the majority can be gradually effected. Admittedly, we are entering unknown territory with automation. But then again, I don't know. Rome destabilized because the ruling classes imported slaves instead of paying its lower classes. So that didn't turn out too well.

Admittedly, looking at that historical, it is looking iffy. If the wealthy don't need labor, then what leverage do the majority have?