The collapse of a tired and worn-out government is not a pretty sight. The causes are usually multiple, although those with a particular axe to grind will always blame the one which fits best with their own perspective on events. The obvious comparison between current events and previous examples is the end of the Major government in 1997; but there are also some parallels with the end of Labour's last period in office in 1979.
It's interesting that in both those years, there was also a referendum on devolution; and in that respect at least, history seems likely to repeat itself again – 2010 seems likely to be both a year in which a tired old government is removed and a year for holding another referendum on the governance of Wales. It's yet to be made clear which will come first.
In 1997, the referendum which was so narrowly won followed the election of the new government; whilst in 1979, it preceded the defeat of the old. From a London perspective, I suspect that the influence of that failed referendum in 1979 on the results of the general election is underestimated. The referenda were only held in Wales and Scotland, after all; and both countries remained more loyal to Labour than did England, despite the Tories reaching double-figures here in Wales.
But although the referendum might have looked peripheral from London, there was little doubt that months of internecine warfare did not help the Labour Party. And that sort of warfare sapped the strength of the party as a whole, not just in Wales and Scotland.
A future Labour leader – widely regarded as one of their rising stars at the time – was pitted against the official line of his party in implementing a policy for which the rank and file had voted. I really don't think that Kinnock has been given the credit / blame (choose according to perspective) which he deserves for his role in ushering in the Thatcher era.
At first sight, any comparison between Hain and Kinnock seems unlikely and unfair – Hain is, after all, a self-avowed devophile, whereas Kinnock was anything but. And yet...
A situation seems to be developing where Hain (although I'm not sure that many would still consider him to be a rising star) is positioning himself in opposition to a clear pledge given by his party (as a result of a vote in a special conference, not just a leadership pronouncement) as part of the One Wales agreement.
He claims, of course, that his opposition is based on a pragmatic assessment of the probable result; but this seems to be based largely on the view that his own assessment is more reliable than that of the opinion polls, or of anyone else. But the similarity with the events of 1979 is that Hain, like Kinnock before him, is in danger of doing more damage to his own party than to his political opponents.