Lancre operated on the feudal system, which was to say, everyone feuded all the time and handed on the fight to their descendants. The chips on some shoulders had been passed down for generations. Some had antique value. A bloody good grudge, Lancre reckoned, was like a fine old wine. You looked after it carefully and left it to your children.
You never wrote to anyone. If you had anything to say, you said it to their face. It kept everything nice and hot.
from Carpe Jugulum by Terry Pratchett