Cold Revenge Revenge: What is it good for?

Studies of tribal warfare seek to answer why humans don't stop at an eye for an eye...
Some call it sweet, a few develop a thirst for it. Virtually everybody has plotted ways to get it.
Now scientists, too, are seeking revenge. Digging through anthropological and archaeological data on tribal warfare, researchers are analyzing the role that payback plays in human relations.
· An eye for an eye [KMSB]

Politicians are like diapers. They should both be changed frequently and for the same reason.
--Anonymous

· The Irony of Electoral Revenge [SMH]