Maybe an OOC discussion within a realm, where players can express their desires, couldbring aid? Once the players are involved, the characters willmore orless follow, each in their own style
What has always bothered me though, is how people can be part of a realm not even sending one letter to anyone. Perhaps their should be more incentives, or penalties. Though I suppose those could be rp'ed too. (for instance a ceremony for the new ruler, absentees get punished -the problem then would be though, that people couldn't care less about the punishment, and banning them only weakens your own realm)