Helen Clark's decision to campaign for the top job at the United Nations puts her in the centre of a stunning piece of history in the making.
It will be a contest like no other.
Whether or not she wins the, her candidacy will be unifying force in New Zealand.
There will be genuine pride in her bid. And there is no down side for John Key in using his own impressive international connections as her champion.
That she wanted the job has been an open secret. But she had choices about whether to make a bid and how to go for it.
She could have sat back and hoped that no consensus would form around another candidate. She might then have the advantage of being the fresh circuit-breaker - coming through the middle.