BY THE standards of European scientific collaboration, €2m ($3.1m) is not a huge sum. But it might be the start of something that will challenge human perceptions of reality at least as much as the billions being spent by the European particle-physics laboratory (CERN) at Geneva. The first task of CERN's new machine, the Large Hadron Collider, which is due to open later this year, will be to search for the Higgs boson—an object that has been dubbed, with a certain amount of hyperbole, the God particle. The €2m, by contrast, will be spent on the search for God Himself—or, rather, for the biological reasons why so many people believe in God, gods and religion in general.
“Explaining Religion”, as the project is known, is the largest-ever scientific study of the subject. It began last September, will run for three years, and involves scholars from 14 universities and a range of disciplines from psychology to economics. And it is merely the latest manifestation of a growing tendency for science to poke its nose into the God business.
Religion cries out for a biological explanation. It is a ubiquitous phenomenon—arguably one of the species markers of Homo sapiens—but a puzzling one. It has none of the obvious benefits of that other marker of humanity, language. Nevertheless, it consumes huge amounts of resources. Moreover, unlike language, it is the subject of violent disagreements. Science has, however, made significant progress in understanding the biology of language, from where it is processed in the brain to exactly how it communicates meaning. Time, therefore, to put religion under the microscope as well.
Explaining Religion is an ambitious attempt to do this. The experiments it will sponsor are designed to look at the mental mechanisms needed to represent an omniscient deity, whether (and how) belief in such a “surveillance-camera” God might improve reproductive success to an individual's Darwinian advantage, and whether religion enhances a person's reputation—for instance, do people think that those who believe in God are more trustworthy than those who do not? The researchers will also seek to establish whether different religions foster different levels of co-operation, for what reasons, and whether such co-operation brings collective benefits, both to the religious community and to those outside it.
It is an ambitious shopping list. Fortunately, other researchers have blazed a trail. Patrick McNamara, for example, is the head of the Evolutionary Neurobehaviour Laboratory at Boston University's School of Medicine. He works with people who suffer from Parkinson's disease. This illness is caused by low levels of a messenger molecule called dopamine in certain parts of the brain. In a preliminary study, Dr McNamara discovered that those with Parkinson's had lower levels of religiosity than healthy individuals, and that the difference seemed to correlate with the disease's severity. He therefore suspects a link with dopamine levels and is now conducting a follow-up involving some patients who are taking dopamine-boosting medicine and some of whom are not.
Such neurochemical work, though preliminary, may tie in with scanning studies conducted to try to find out which parts of the brain are involved in religious experience. Nina Azari, a neuroscientist at the University of Hawaii at Hilo who also has a doctorate in theology, has looked at the brains of religious people. She used positron emission tomography (PET) to measure brain activity in six fundamentalist Christians and six non-religious (though not atheist) controls. The Christians all said that reciting the first verse of the 23rd psalm helped them enter a religious state of mind, so both groups were scanned in six different sets of circumstances: while reading the first verse of the 23rd psalm, while reciting it out loud, while reading a happy story (a well-known German children's rhyme), while reciting that story out loud, while reading a neutral text (how to use a calling card) and while at rest.
Dr Azari was expecting to see activity in the limbic systems of the Christians when they recited the psalm. Previous research had suggested that this part of the brain (which regulates emotion) is an important centre of religious activity. In fact what happened was increased activity in three areas of the frontal and parietal cortex, some of which are better known for their involvement in rational thought. The control group did not show activity in these parts of their brains when listening to the psalm. And, intriguingly, the only thing that triggered limbic activity in either group was reading the happy story.
Dr Azari's PET study, together with one by Andrew Newberg of the University of Pennsylvania, which used single-photon emission computed tomography done on Buddhist monks, and another by Mario Beauregard of the University of Montreal, which put Carmelite nuns in a magnetic-resonance-imaging machine, all suggest that religious activity is spread across many parts of the brain. That conflicts not only with the limbic-system theory but also with earlier reports of a so-called God Spot that derived partly from work conducted on epileptics. These reports suggested that religiosity originates specifically in the brain's temporal lobe, and that religious visions are the result of epileptic seizures that affect this part of the brain.
Though there is clearly still a long way to go, this sort of imaging should eventually tie down the circuitry of religious experience and that, combined with work on messenger molecules of the sort that Dr McNamara is doing, will illuminate how the brain generates and processes religious experiences. Dr Azari, however, is sceptical that such work will say much about religion's evolution and function. For this, other methods are needed.
Dr McNamara, for example, plans to analyse a database called the Ethnographic Atlas to see if he can find any correlations between the amount of cultural co-operation found in a society and the intensity of its religious rituals. And Richard Sosis, an anthropologist at the University of Connecticut, has already done some research which suggests that the long-term co-operative benefits of religion outweigh the short-term costs it imposes in the form of praying many times a day, avoiding certain foods, fasting and so on.
