After last night's decimation, Labour needs to answer serious questions. How do we end factionalism, and come together as a party? How do we reconcile liberal Londoners with more socially conservative voters in the north? And who is best placed to lead us?
The worst thing we could do is descend into tribal infighting. We are strong when we are united. The leadership made serious mistakes, but built a huge movement that will be vital to our future. Let's bring all sides of our party together behind a new and credible offer.
Across much of the developed world, the challenges are the same. Social democratic and socialist parties are struggling in the face of populist nationalism. We need an offer that appeals to people's need to belong, as well as their pockets. Culture as well as economics.
The next leader has a mammoth task. The first job is to apologise deeply to Jewish people and begin to recover their trust. Then we need to rebuild our movement around the tough lessons we have learned. If we fail, we get a full decade of Boris Johnson in Number 10.
