Altruism avslöjas vara djurisk instinkt
med biologisk härstamning

"You gotta see this!" Jorge Moll had written. Moll and Jordan Grafman, neuroscientists at the National Institutes of Health, had been scanning the brains of volunteers as they were asked to think about a scenario involving either donating a sum of money to charity or keeping it for themselves.

As Grafman read the e-mail, Moll came bursting in. The scientists stared at each other. Grafman was thinking, "Whoa -- wait a minute!"

The results were showing that when the volunteers placed the interests of others before their own, the generosity activated a primitive part of the brain that usually lights up in response to food or sex. Altruism, the experiment suggested, was not a superior moral faculty that suppresses basic selfish urges but rather was basic to the brain, hard-wired and pleasurable.

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Grafman and others are using brain imaging and psychological experiments to study whether the brain has a built-in moral compass. The results -- many of them published just in recent months -- are showing, unexpectedly, that many aspects of morality appear to be hard-wired in the brain, most likely the result of evolutionary processes that began in other species.

No one can say whether giraffes and lions experience moral qualms in the same way people do because no one has been inside a giraffe's head, but it is known that animals can sacrifice their own interests: One experiment found that if each time a rat is given food, its neighbor receives an electric shock, the first rat will eventually forgo eating.

What the new research is showing is that morality has biological roots -- such as the reward center in the brain that lit up in Grafman's experiment -- that have been around for a very long time.

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Moral decisions can often feel like abstract intellectual challenges, but a number of experiments such as the one by Grafman have shown that emotions are central to moral thinking. In another experiment published in March, University of Southern California neuroscientist Antonio R. Damasio and his colleagues showed that patients with damage to an area of the brain known as the ventromedial prefrontal cortex lack the ability to feel their way to moral answers.

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Joshua D. Greene, a Harvard neuroscientist and philosopher, said multiple experiments suggest that morality arises from basic brain activities. Morality, he said, is not a brain function elevated above our baser impulses. Greene said it is not "handed down" by philosophers and clergy, but "handed up," an outgrowth of the brain's basic propensities.

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Neuroscience research, Greene said, is finally explaining a problem that has long troubled philosophers and moral teachers: Why is it that people who are willing to help someone in front of them will ignore abstract pleas for help from those who are distant, such as a request for a charitable contribution that could save the life of a child overseas?

"We evolved in a world where people in trouble right in front of you existed, so our emotions were tuned to them, whereas we didn't face the other kind of situation," Greene said. "It is comforting to think your moral intuitions are reliable and you can trust them. But if my analysis is right, your intuitions are not trustworthy. Once you realize why you have the intuitions you have, it puts a burden on you" to think about morality differently. ¹

Den judisk-kristna tron, som i över 2000 år har hävdat att människan är överlägsen djuren p.g.a. sin moraliska förmåga, visar sig nu ha fel; vi skänker pengar till fattiga barn i Afrika, inte för att vi är osjälviska, utan tvärtom för att vi är egoistiska och mår bra av att ge till andra. Moral är inte en mänskligt överlägsen förmåga, utan en biologiskt naturlig funktion av hjärnan hos alla varelser.