Would be kind of interesting to see a radical left movement that does not try to commit entirely to any singular particular thinker. Have it be more, open-minded, like, "Sure, thinker so and so had some good ideas, but I disagree with him in that regard, of course, there I am more inclined to agree with-..." etc., etc. Kind of like how liberals aren't slaves to Adam Smith nor conservatives in particular are not slaves to Edmund Burke.
But perhaps it is inherent to collectivist ideologies that they eventually all fall victims to a drive for conformity, and the self-destructive zeal for purity and unity of thought that that invariably brings with it. Pluralism, in a sense, requires individualism, and so a movement which regards individualism as something bad will over time necessarily counteract pluralism.