[O]utward-looking, willing to engage with the unpersuaded, hopeful, positive: that is the only way the left can thrive. We can't just want retweets a… - Owen Jones

Some within Labour want to establish a year zero, which simply consigns the last five years to a dustbin labelled "Never to be repeated", but while that might suit factional ends, it advances no debate about the party's future in an era of unprecedented social turmoil. The need for a transformative political agenda is far greater now than when Corbyn first stood: but without a balanced understanding of the last five years it will prove impossible.

If Corbyn decides he is unable to confront the multiple existential crises enveloping Labour, then an agreement should be struck where he can stand down in exchange for the guarantee of an MP from the new generation on the ballot paper who is committed to the policies that inspired Corbyn's supporters in the first place. It is up to both Corbyn and the parliamentary Labour party. They should both be aware that history is a savage judge.

As Jeremy Corbyn is surrounded by cheering crowds, Labour generally, and the left specifically, are teetering on the edge of looming calamity.