Just watched Bracks' rather lovely speech to the press.
He looks together, cheerful, energetic, relieved and uncrumpled. He is the opposite of ashen or shaken. He can hardly stop smiling.
He says that 'the events of recent weeks' have only confirmed, rather than caused, his decision to resign. And by the look of him, this is true.
So here's my theory: he has watched Blair (his almost-contemporary); he has watched Howard; and he has thought Hmmm, who's looking better, in every possible way?
Can it be that we've finally reached an era in which politicians do not grimly cling onto power at any cost but go in an orderly fashion, leaving their constituencies and their parties in good shape and their own psyches intact or even rejuvenated?
I'm guessing that male journalists and politicans over about 55 will find this incomprehensible, and will keep insisting that there's some other reason Bracks isn't telling us about. But probably nobody else will.