AN ARGUMENT often advanced for the encouragement of religion is that, to paraphrase St Matthew’s report of Jesus’s words, it leads people to love their neighbours as themselves. That would be a powerful point were it true. But is it? This was the question Jean Decety, a developmental neuroscientist at the University of Chicago, asked in a study just published in Current Biology.
Dr Decety is not the first to wonder, in a scientific way, about the connection between religion and altruism. He is, though, one of the first to do it without recourse to that standard but peculiar laboratory animal beloved of psychologists, the undergraduate student. Instead, he collaborated with researchers in Canada, China, Jordan, South Africa and Turkey, as well as with fellow Americans, to look at children aged between five and 12 and their families.
Altogether, Dr Decety and his colleagues recruited 1,170 families for their project, and focused on one child per family. Five hundred and ten of their volunteer families described themselves as Muslim, 280 as Christian, 29 as Jewish, 18 as Buddhist and 5 as Hindu. A further 323 said they were non-religious, 3 were agnostic and 2 ticked the box marked “other”.
Follow-up questions to the faithful among the sample then asked how often they engaged in religious activities, and also about spirituality in the home. That let Dr Decety calculate how religious each family was. He found that about half the children in religious households came from highly observant homes; the spiritual lives of the other half were more relaxed. He then arranged for the children to play a version of what is known to psychologists as the dictator game—an activity they use to measure altruism.