The former PM seizes the initiative with a timetable for further devolution to Scotland.
The timing of the vote, the wording of the question, and allowing 16-17-year-olds to vote.
Alex Salmond, whose political mission from the outset was to destroy Great Britain, might end up creating the conditions in which it can be remade and thus saved.
Labour leader will tell the TUC general council: "What working people have in common matters more than any division of creed, race or region. Or even nation."
The decision to keep devo max off the ballot paper may come to be seen as the Unionists' biggest error.
Pro-independence side takes the lead for the first time with less than two weeks to go.
Fighting against Scottish independence, the former PM makes the case for social justice far better now than when he was in office.
It is easy to imagine him as the popular mayor of a minor American city. What works when he is playing to the gallery, however, will not work if he becomes the head of a sovereign nation.
Telling Scotland not to “go” is a bit like saying: “We don’t want you to run your own affairs. You must always have the governments we give you.”
The possibility of a Conservative victory in 2015 is one of the Yes campaign's biggest trump cards.