By Mark Vernon
I was at a conference just recently, where we told tales of vampire bats that share their blood, bacteria that work together, and monkeys that ease group tensions by making love. It set me thinking about the evolution of morality, for there is one story of it that's often told, and it begins with a problem. Natural selection favors the best-adapted individual: it's called survival of the fittest. It explains why we feel fear or lust. But how can this ‘selfish' account of natural selection explain moral emotions like altruism that might lead the individual to abandon self-interest in favor of others, even to the point of self-sacrifice?
The problem is resolved by pointing out that it's only the gene that is ‘selfish.' That take allows for circumstances in which the survival of the individual may not best serve the transmission of the gene. For example, the interests of the gene may be better served if the individual is sacrificed for the sake of the group, when the group is composed of kin -- other carriers of the gene. That'd explain why parents will surrender all for the benefit of their children. Alternatively, the gene may be best served if the individual is prepared to form cooperative relationships with others, on the basis that if I scratch your back, you might scratch mine.
Now, this story accounts for many instances of kin and reciprocal altruism in the natural world. However, it comes unstuck with humans. We look odd from an evolutionary perspective because we will sacrifice ourselves for individuals with whom we don't share our genes, and when there's no prospect of the favor being returned. Call it our Good Samaritan tendency.
In order to explain these anomalies, some biologists have appealed to Darwinian "misfirings." Richard Dawkins, for one, refers to altruism and the like not just as misfirings but "blessed mistakes." They single humans out as alone being able to "rebel against the tyranny of the selfish replicators," as he famously put it at the end of The Selfish Gene. Thank evolution's oversight for that.
However, if this argument is offered to save appearances when it comes to human morality, it is withdrawn when it comes to religion. Religion too is a misfiring for Dawkins -- but not a blessed one. Instead it is "an unfortunate byproduct of an underlying psychological propensity." Perhaps our ancestors developed an instinct to believe in godlike authority as a result of the survival benefits of obeying parents without question; and for an imaginative child, it's a small move from believing in an irreproachable earthly father to believing in a divine one. And also a ghastly mistake. Homo religious is like the moth that flies into the candle flame. Before candles, light was a means of navigation; in a world with candles, the instinct causes death. Similarly, following religious instincts leads to death -- your own or that of others, often on a massive scale. Modern people, Dawkins implores, must exercise their reason and override the misfiring.
It's All About Trust
But is that story right? Might the selfish account of evolution itself be a misfiring of Darwin's theory? And if so, could evolutionary theory lead not to opposition, but to a renewed interest in religion -- perhaps even respect for it? It's a possibility suggested by the work of David Sloan Wilson, the champion of a different account of morality. The selfish story, he says, is a product of the "age of individualism" in evolutionary theory, an age that is both aberrant and, he believes, will prove to be short-lived.
Wilson's work incorporates group selection into evolutionary theory: evolution might pick a trait not because it's good for the individual, but because it's good for the group. (For this reason, it's known as multi-level selection.) The reason for doing so is that with the trait, members of the group survive better.
Charles Darwin himself expressed something like this view. In The Descent of Man, he writes:
There can be no doubt that a tribe including many members who, from possession in a high degree the spirit of patriotism, fidelity, obedience, courage, and sympathy, were always ready to aid one another, and to sacrifice themselves for the common good, would be victorious over most other tribes; and this would be natural selection.
To put it another way, Darwin questions the exclusively selfish foundations of morality. As he also wrote, "the moral sense is fundamentally identical with the social instincts."