Agrajag Complex

A psychotic need to avenge oneself on a group, nation, or whatever because of real or alleged victimisation visited on one's ancestors by the ancestors of the target. The person afflicted with the Agrajag Complex almost - indeed sometimes literally - seems to regard such insults as having been visited on themself personally, and dwells on the grievance so much that they cripple themselves mentally and emotionally. From the character of Agrajag in Douglas Adams' Hitchhiker's Guide to the Galaxy series of novels, who has reincarnated many times as a wide variety of different creatures, each of which was killed (or at least looked at in their last moments, Agrajag believes smugly), by Arthur Dent. Agrajag returns to take revenge on Dent in the form of a giant mutant bat with long curving teeth that lacerate his own face every time he moves his jaw.