"Many Native American tribes would consult a shaman before embarking on a hunting expedition. In one tribe, a shaman would take a caribou bone, carve on it images of the kind of prey the tribe were keen to find (buffalo, deer, trailer-park video-poker addicts) and then place it on a fire. At some point the heat of the fire would cause the bone to split. The hunting party would then set out unquestioningly in the direction of the line of the crack.
"This is of course a completely insane practice; the kind of irrational, superstitious nonsense that would have Richard Dawkins foaming at the mouth. Except it isn’t. In fact, it’s rather brilliant.
"One hundred years ago there was no surefire way of predicting where to find a buffalo herd. But there were two ways to improve your odds when hunting them. First it is better to keep moving. Secondly it is a good idea not to hunt buffalo alone: hence it is vital for the group of hunters to stick together — and to maintain internal cohesion and solidarity. Once you get disunity or dissent (‘I told you we should have gone west this time or ‘Why didn’t we go fishing instead?’) your odds of success fall dramatically. Since disobeying the shaman was unthinkable, this kind of dissent almost never arose. A sociologist would say that the bone-cracking ritual helps create gemeinschaft rather than gesellschaft — it helps individuals subordinate their different interests to the common good. A military man would call it camaraderie.
"Once you understand that man is a eusocial species (humans were recently described by the evolutionary psychologist Jonathan Haidt as ‘90 per cent chimp, 10 per cent bee’), many seemingly arbitrary and irrational religious practices reveal a remarkable hidden intelligence. They may not seem to make sense intellectually, but behaviourally they work."
