I blame you, Fukiyama!

A good diagnosis of the Labour Party's failure to make positive change happen would be that when the Grand Narratives of human thought were said to have ended (𝘐 𝘮𝘰𝘴𝘵𝘭𝘺 𝘣𝘭𝘢𝘮𝘦 𝘺𝘰𝘶, 𝘍𝘶𝘬𝘪𝘺𝘢𝘮𝘢!) it simply fell back on complying with the hegemonic concepts of the day. Such as neoliberalism. As being common sense.

It lost faith in its own idea of socialism (and virtually banned the word, in effect). In failing to engage with its own founding concepts, it allowed Blairite neo-neoliberalism to become the new faith. Not so much because of putative vote-winning capacity, but more like a reassurance that its own new ideology had a mode of 'soundness' which could stand up to the post-Thatcher environment.

They're still, at root, hacking away at this today. They lose because of 'mauvaise foi' and poor analysis. They lose before they've even started because their concepts comply with the hegemonic game that they did not start and the rules of which they simply agreed with.

Yes, a good diagnosis of the Labour Party would be "𝘛𝘩𝘦𝘺 𝘥𝘰𝘯'𝘵 𝘬𝘯𝘰𝘸 𝘵𝘩𝘦𝘪𝘳 𝘸𝘢𝘺 𝘢𝘣𝘰𝘶𝘵".

Apologies, Ludwig.