Defection Denial

One of the themes the DHA project has explored over the past two years is how cooperation emerges in multilateral negotiating environments. One of the challenges in informal social exchange in these situations involves judging others and deciding who is trustworthy and who’s not – in game theory terms this would mean discerning the difference between a cooperator and a defector. We would expect known defectors to be punished for their infractions. But recent research suggests this is not how humans normally react in everyday situations. Instead, we tend to overlook or “forgive” the wrongs others commit.

In fact, as University of Miami psychologist Michael McCullough told the New York Times recently:

“The closer you look, the more clearly you see that denial is part of the uneasy bargain we strike to be social creatures… We really do want to be moral people, but the fact is that we cut corners to get individual advantage, and we rely on the room that denial gives us to get by, to wiggle out of speeding tickets, and to forgive others for doing the same.”

One recent study used a simple investment game, where two people decide whether or not (and how much) to contribute to a shared investment pool, to explore this phenomenon. In this version of the game, one player could “cut off” their opponent if they believed his/her contributions were too low. The study revealed that once players were in a pattern of mutual trust based on repeated adequate donations to the investment pool, it became harder to punish future infractions. Some players would tolerate four to five selfish moves by a “trusted” opponent before cutting them off whereas they would tolerate only one infraction from a stranger. The researchers interpreted this result to be rooted in denial – players believed “trusted” opponents had to be making errors, not simply trying to maximize their personal gains.

Simulating this result through many generations on a computer revealed that this denial strategy was critical to the stability and evolutionary fitness of the overall group. In other words, overlooking or forgiving defection was an important survival strategy. This corresponds with Karl Sigmund and Martin Nowak’s findings of their evolutionary computer tournament, run in 1991. The most successful strategy was generous tit-for-tat (GTFT). GTFT is a “nice” strategy meaning it was never the first to defect, even if defection was its opponent’s first move. GTFT also randomly cooperated once for approximately every three defections against it. In this simulation, as it seems in real-life, it pays to let bygones be bygones.

Psychologists suggest that denial could be important in protecting us against unbearable news and that this ability is critical to forming (and maintaining) close relationships. Moral violations are glossed over as “stumbles or lapses in competence,” making the original violation more bearable. Since people oftentimes aren’t as trustworthy as we assume them to be, this attitude allows us to overlook potentially devastating defections in everyday life and carry on as normal, nurturing close relationships despite a few wrongs here and there.


Ashley Thornton

References
Photo retrieved from flickr.com.
“Denial Makes the World go Round,” New York Times, 20 November 2007.

Fun and Games

The New York Times has just published an interesting profile of Harvard scientist, Professor Martin Nowak, director of the university's Program for Evolutionary Dynamics. Nowak is a gamer - that is he takes informal ideas and builds them into versatile mathematical models in fields as diverse as economics and cancer biology.

What's this got to do with human security or disarmament diplomacy? For some time, we on the DHA project have been thinking about what insights from the natural and behavioural sciences could do for work in these areas. We explored some of these in a recent book we published, entitled "Thinking Outside the Box in Multilateral Disarmament and Arms Control Negotiations" (click on the pink book at left to explore its contents).

The underlying theme in Nowak's many projects is that of cooperation, "one of the most puzzling yet fundamental features of life".

It's also a particular source of fascination for me because international relations are essentially problems of cooperation played out among states with different levels of interest, power and resources - inspired in part by the work of scholars like Robert Axelrod and Thomas Schelling.

In some multilateral contexts structural or institutional factors can constrain the ways in which cooperation can develop. I discussed this in a chapter of our book called "Cooperation and Defection in the Conference on Disarmament" using some simple insights from game theory like variations of the classic Prisoners' Dilemma. I talked about the importance of "clusters of cooperators" in a population, who can change the rules of the game in real life situations as varied as the spread of viruses to the core group behind the 1997 Anti-Personnel Mine Ban Convention.

My hunch is that behind all of the complexity of multilateral relationships lie some pretty basic rules-of-thumb, which could be summarized like this:

1. Figure out what's in your best self-interest, but take a broad view and look in the longer term if you can (call it enlightened self-interest, if you will).

2. Identify others you can work with to pursue your interest. Common interest is the best basis for sustained cooperation.

3. Cooperate. In the short term you may face opposition and obstacles from "defectors". But don't worry so much about it. You're stronger in a cluster, and over the long term you'll change the rules of the game - or pay-off structure - of interactions for everyone. Social interactions matter.

In contrast, Nowak has been working on problems like the spread of cancer cells in the body. But he realised the tools he was using might be applied to human problems, especially when applied to thinking about social networks:

"Dr. Nowak and his colleagues found that when they put players into a network, the Prisoner elsewhere in the network are not able to undermine their altruism. "Even if outside our network there are cheaters, we still help each other a lot," Dr. Nowak said. That is not to say that cooperation always emerges. Dr. Nowak identified the conditions when it can arise with a simple equation: B/C>K. That is, cooperation will emerge if the benefit-to-cost (B/C) ratio of cooperation is greater than the average number of neighbours (K). "It's the simplest possible thing you could have expected, and it's completely amazing," he said."

John Borrie


References

Carl Zimmer, "In Games, an Insight Into the Rules of Evolution", New York Times (31 July 2007), see http://www.nytimes.com/2007/07/31/science/31prof.html
?_r=1&8dpc&oref=slogin.

John Borrie, "Cooperation and Defection in the Conference on Disarmament", in Thinking Outside the Box in Multilateral Disarmament and Arms Control Negotiations", Geneva: UNIDIR: 2006.

Picture by revlimit retrieved from Flickr.