OSLO, Norway — I was lying in bed thinking about how I tortured the man who had raped my partner, how I made sure he didn't die at once but still experienced some of the fear and physical suffering he had inflicted upon this innocent woman beside me, who had escaped by the skin of her teeth. Half-asleep, I smiled, warmed by the duvet and the glow of revenge and slept like a baby. The latter, I hope, because there had in fact been no rape, no rapist, no torture.
So why this thirst for revenge?
Well, it is possible that yours truly is just a sick deviant who ended up writing gory crime novels instead of what might be seen as the alternative — to everyone's benefit. It is also possible that I am a pretty normal individual who enjoys these fantasies to savor the feeling of relief, catharsis and restored harmony that a fitting revenge affords the average civilized person.
Revenge has the reputation of being a barbaric, shortsighted and pointless instinct, an aspect of our human makeup we ought to resist. Humanitarians take issue with it, and at any rate it is hard to argue that revenge is humane. If you, an animal, attack an antelope's calf for reasons of hunger, you have to expect that the mother will fight back with her horns, bite and kick to protect her offspring. But only until such time as the calf is dead and gone. Then it would — according to antelope logic — be futile to continue. It would be wasting valuable energy fighting a lost cause, which no animal on the savanna can afford to do; after all, the antelope has other calves to take care of. You are left to eat your prey undisturbed.
So why don't humans think like this? Wouldn't it save us a lot of unnecessary conflict if, like the antelope, we could put wrongdoing behind us, forget it and move on? Possibly. But it would make it far more tempting for others to have a go at the rest of your offspring.
That is why revenge is more than a shortsighted and pointless instinct; it is an example of man's sublime capacity for abstract thought. By avenging a misdeed we don't regain what we have lost, but we ensure that misdeeds have consequences that we hope can be a deterrent in the abstract future: Your adversary knows that attacking your offspring has a cost, even if the attack is successful. Or especially if it is successful.
That is an inescapable conclusion. It is a completely rational notion and a logical strategy in a society where resources are scarce and there are conflicting interests. So long as members of a society can be fairly certain that crimes against others will be avenged — at least in the bigger picture — this will act as a regulator of social behavior.
In many societies, revenge has a long history of being a private affair, practiced with murderous enthusiasm and imagination. In the Iceland of Viking times and the clan societies of Albania, to give just two examples, blood vengeance was accepted and carried out at the family level. We may assume that the families disagreed about guilt and justice, but gradually, as revenge killings were avenged with more killings, the original injustice became less significant and the spirals of revenge so widespread that they decimated the population of these isolated societies.