Silmarillion - Chapter 24 - Of the Voyage of Eärendil and the War of Wrath

[Galadriel55]

Originally Posted by Inziladun

So, the Noldor had been guilty of the Kinslaying, and other evil deeds in Beleriand later. Why did Men have to be spoken for? Because some of them had followed Morgoth? Does that indicate that the Dwarves were in no need of a spokesman, that they just weren't as "guilty" in the eyes of the Valar as the other two kindreds?

The Dwarves do seem separate from Elves and Men. I think that their lives were entirely separate from the Two Kindreds, aside from some trade and a few words with them. They were by themselves. Elves and Men (especially Edain) were interlocked. The Edain adopted Elvish tradition, they lived with the Elves, they fought for the Elves (for themselves too, obviously, but for the Elves second right after that). The Men thus also got their share of the Doom of the Noldor. Dwarves, even though they helped, didn't fight for the Elves. They lived their own lives, independant of the Fair Folk. If they had any Doom, it was of the Dwarves.

Men, Edain in particular, put themselves under the same roof as Elves. Dwarves didn't. That's why Men need to be spoken for, and Dwarves aren't.

Just as a side note, intermarriage between Elves and Men is highly rare, but it happened. You don't see any Dwarf marrying outside of his/her kin. They were strictly separate.