As a result of this work a new view is emerging that challenges simplistic ideas about the link between religion and morality. Instead of religion being a source of morality or immorality, some researchers now believe that morality and religion are both deep-rooted aspects of human nature. We do not need religion to live moral lives, but without it morality might never have evolved. This kind of thinking could explain the complex and apparently contradictory relationship between religious beliefs and moral behaviour that is being demonstrated. It could also make some sense of religion's remarkable staying power, as well as highlighting the futility of attempts to persuade believers to abandon their faith by rational argument.

[...]

So why do religious concepts provoke moral behaviour even in non-believers? It's because both religion and morality are evolutionary adaptations, says Jesse Bering, who heads the Institute of Cognition and Culture at Queen's University, Belfast, UK. Morality does not stem from religion, as is often argued, he suggests: they evolved separately, albeit in response to the same forces in our social environment. Once our ancestors acquired language and theory of mind - the ability to understand what others are thinking - news of any individual's reputation could spread far beyond their immediate group. Anyone with tendencies to behave pro-socially would then have been at an advantage, Bering says: "What we're concerned about in terms of our moral behaviour is what other people think about us." So morality became adaptive.

At the same time the capacity for religious belief would also have emerged. Our reputation-conscious ancestors would have experienced a pervasive feeling of being watched and judged, he says, which they would readily have attributed to supernatural sources since the cognitive system underlying theory of mind also seeks to attribute intentionality and meaning, even where there is none. So the same adaptations that led to morality could also have driven the evolution of religion.

Meanwhile, evolutionary biologist David Sloan Wilson of the State University of New York argues that religious practices are also important for group cohesion and are therefore subject to group selection. As humans have become ever more social over the past 100,000 years, and especially from 10,000 years ago, when agriculture led to huge division of labour in societies, religion and morality would have co-evolved as ways to promote social cohesion. "Religion did play a crucial role in giving us our moral nature, at least evolutionarily speaking," says psychologist Jonathan Haidt from the University of Virginia.

Nowadays, adds Bering, whether we believe in a God or not, the brain architecture that causes us to behave as though we might get caught behaving badly is still present. As a result, atheists are no more likely to be immoral than believers. Indeed, his own experiments show that, regardless of whether people believe in supernatural beings, both adults and children cheat less when performing a task in private if Bering has first primed them with the idea that there may be a "god" or a "ghost" watching.

[...]