The Greens need to learn the right lessons from the destruction of Corbynism

For more than a decade, Britain’s acrimonious politics has included a fundamental but often misunderstood battle. Sometimes it is fought out in the open and sometimes more in the shadows. Its protagonists extend far beyond Westminster, into the media, big business, the civil service, activist movements and important but neglected parts of the electorate. And despite how long the battle has been going on, it’s still hard to say which side will prevail.

On one side are millions of left-leaning Britons – many of them young – whose economic prospects are worsening, whose anxieties about the climate crisis are rising, whose horror at Israel and the US’s wars is absolute, and whose alienation from the compromises of conventional Labour politics is deep. This is the large minority of the electorate attracted by Jeremy Corbyn’s attempt to radicalise Labour between 2015 and 2019, and now increasingly drawn to Zack Polanski’s leftwing, populist reshaping of the Greens. For both leaders, the ultimate, hugely ambitious aim was or is to create a much more equal, environmentally sustainable country with a much more ethical foreign policy.

Yet fundamentally opposed to this project is another coalition of interests, including the rightwing media, the right of the Labour party, the Conservative party, corporate lobbyists, defenders of Israel and the Anglo-American “special relationship”, and supposedly realistic centrists from the opinion pages of the Financial Times to the deep-state recesses of Whitehall. Protecting Britain’s status quo, by any means necessary, against the disruptive plans of the left has been one of this loose and adaptable establishment’s main priorities for decades, arguably for centuries. And it has rarely been defeated in this struggle.

Thus, Corbyn’s leadership was steadily undermined by claims that he was a dangerous extremist who threatened national security and........

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