Читаем The Compassionate Instinct полностью

These observations suggest that apart from emotional connectedness, apes have an appreciation of the other’s situation and show a degree of perspective taking. One striking report in this regard concerns a bonobo female named Kuni, who found a wounded bird in her enclosure at Twycross Zoo, in England. Kuni picked up the bird, and when her keeper urged her to let it go, she climbed to the highest point of the highest tree, carefully unfolded the bird’s wings and spread them wide open, one wing in each hand, before throwing it as hard as she could toward the barrier of the enclosure. When the bird fell short, Kuni climbed down and guarded it until the end of the day, when it flew to safety. Obviously, what Kuni did would have been inappropriate toward a member of her own species. Having seen birds in flight many times, she seemed to have a notion of what would be good for a bird, thus giving us an anthropoid illustration of Smith’s “changing places in fancy.”

This is not to say that all we have are anecdotes. Systematic studies have been conducted on so-called “consolation” behavior. Consolation is defined as friendly or reassuring behavior by a bystander toward a victim of aggression. For example, chimpanzee A attacks chimpanzee B, after which bystander C comes over and embraces or grooms B. Based on hundreds of such observations, we know that consolation occurs regularly and exceeds baseline levels of contact. In other words, it is a demonstrable tendency that probably reflects empathy, since the objective of the consoler seems to be to alleviate the distress of the other. In fact, the usual effect of this kind of behavior is that the distressed animal stops screaming, yelping, and exhibiting other signs of distress.

A BOTTOM-UP VIEW OF EMPATHY

The above examples help explain why to the biologist, a Russian doll is such a satisfying plaything, especially if it has a historical dimension. I own a doll of Russian president Vladimir Putin, within whom we discover Yeltsin, Gorbachev, Brezhnev, Kruschev, Stalin, and Lenin, in that order. Finding a little Lenin and Stalin within Putin will hardly surprise most political analysts. The same is true for biological traits: the old always remains present in the new.

This is relevant to the debate about the origins of empathy, especially because of the tendency in some disciplines, such as psychology, to put human capacities on a pedestal. They essentially adopt a top-down approach that emphasizes the uniqueness of human language, consciousness, and cognition. But instead of trying to place empathy in the upper regions of human cognition, it is probably best to start out examining the simplest possible processes, some perhaps even at the cellular level. In fact, recent neuroscience research suggests that very basic processes do underlie empathy. Researchers at the University of Parma, in Italy, were the first to report that monkeys have special brain cells that become active not only if the monkey grasps an object with its hand but also if it merely watches another do the same. Since these cells are activated as much by doing as by seeing someone else do, they are known as mirror neurons, or “monkey see, monkey do” neurons.

It seems that developmentally and evolutionarily, advanced forms of empathy are preceded by and grow out of more elementary ones. Biologists prefer such bottom-up accounts. They always assume continuity between past and present, child and adult, human and animal, even between humans and the most primitive mammals.

So, how and why would this trait have evolved in humans and other species? Empathy probably evolved in the context of the parental care that characterizes all mammals. Signaling their state through smiling and crying, human infants urge their caregiver to take action. This also applies to other primates. The survival value of these interactions is evident from the case of a deaf female chimpanzee I have known named Krom, who gave birth to a succession of infants and had intense positive interest in them. But because she was deaf, she wouldn’t even notice her babies’ calls of distress if she sat down on them. Krom’s case illustrates that without the proper mechanism for understanding and responding to a child’s needs, a species will not survive.

During the 180 million years of mammalian evolution, females who responded to their offspring’s needs out-reproduced those who were cold and distant. Having descended from a long line of mothers who nursed, fed, cleaned, carried, comforted, and defended their young, we should not be surprised by gender differences in human empathy, such as those proposed to explain the disproportionate rate of boys affected by autism, which is marked by a lack of social communication skills.