Can anything good come from Men?

[Legate of Amon Lanc]

Truly, to me it seems so that in the North, there is the "throne of all evil", ever since Angband was there. The outposts come and go, even Mordor is established somewhere simply because it's far away enough from the Elves. Had Mordor not been possible to reoccupy and had the White Council not driven out of Mirkwood, Dol Guldur might have become next in the line of "evil realms". But it was the North, where Varda

Originally Posted by Sil, Chapter 3: Of the Coming of the Elves and the Captivity of Melkor

high in the north as a challenge to Melkor she set the crown of seven mighty stars to swing, Valacirca, the Sickle of the Valar and sign of doom.

The North was important, and despite the fact that Melkor was driven away, one can never get rid of the feeling that there is the place where the axis of the world lies (now I am intentionally phrasing it like that, so that you can read it metaphorically).