The hypothetical situations involving the runaway trolley become increasingly ingenious, and the moral dilemmas correspondingly tortuous. Hauser contrasts the dilemmas faced by hypothetical individuals called Ned and Oscar. Ned is standing by the railway track. Unlike Denise, who could divert the trolley onto a siding, Ned's switch diverts it onto a side loop which joins the main track again just before the five people. Simply switching the points doesn't help: the trolley will plough into the five anyway when the diversion rejoins the main track. However, as it happens, there is an extremely fat man on the diversionary track who is heavy enough to stop the trolley. Should Ned change the points and divert the train? Most people's intuition is that he should not. But what is the difference between Ned's dilemma, and Denise's? Presumably people are intuitively applying Kant's principle. Denise diverts the trolley from ploughing into the five people, and the unfortunate casualty on the siding is 'collateral damage', to use the charmingly Rumsfeldian phrase. He is not being used by Denise to save the others. Ned is actually using the fat man to stop the trolley, and most people (perhaps unthinkingly), along with Kant (thinking it out in great detail), see this as a crucial difference.
The difference is brought out again by the dilemma of Oscar. Oscar's situation is identical to Ned's, except that there is a large iron weight on the diversionary loop of track, heavy enough to stop the trolley. Clearly Oscar should have no problem deciding to pull the points and divert the trolley. Except that there happens to be a hiker walking in front of the iron weight. He will certainly be killed if Oscar pulls the switch, just as surely as Ned's fat man. The difference is that Oscar's hiker is not being used to stop the trolley: he is collateral damage, as in Denise's dilemma. Like Hauser, and like most of Hauser's experimental subjects, I feel that Oscar is permitted to throw the switch but Ned is not. But I also find it quite hard to justify my intuition. Hauser's point is that such moral intuitions are often not well thought out but that we feel them strongly anyway, because of our evolutionary heritage.
In an intriguing venture into anthropology, Hauser and his colleagues adapted their moral experiments to the Kuna, a small Central American tribe with little contact with Westerners and no formal religion. The researchers changed the 'trolley on a line' thought experiment to locally suitable equivalents, such as crocodiles swimming towards canoes. With corresponding minor differences, the Kuna show the same moral judgements as the rest of us.
Of particular interest for this book, Hauser also wondered whether religious people differ from atheists in their moral intuitions. Surely, if we get our morality from religion, they should differ. But it seems that they don't. Hauser, working with the moral philosopher Peter Singer,87 focused on three hypothetical dilemmas and compared the verdicts of atheists with those of religious people.
In each case, the subjects were asked to choose whether a hypothetical action is morally 'obligatory', 'permissible' or 'forbidden'. The three dilemmas were:
The main conclusion of Hauser and Singer's study was that there is no statistically significant difference between atheists and religious believers in making these judgements. This seems compatible with the view, which I and many others hold, that we do not need God in order to be good — or evil.
IF THERE IS NO GOD, WHY BE GOOD?
Posed like that, the question sounds positively ignoble. When a religious person puts it to me in this way (and many of them do), my immediate temptation is to issue the following challenge: 'Do you really mean to tell me the only reason you try to be good is to gain God's approval and reward, or to avoid his disapproval and punishment? That's not morality, that's just sucking up, apple-polishing, looking over your shoulder at the great surveillance camera in the sky, or the still small wiretap inside your head, monitoring your every move, even your every base thought.' As Einstein said, 'If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed.' Michael Shermer, in The Science of Good and Evil, calls it a debate stopper. If you agree that, in the absence of God, you would 'commit robbery, rape, and murder', you reveal yourself as an immoral person, 'and we would be well advised to steer a wide course around you'. If, on the other hand, you admit that you would continue to be a good person even when not under divine surveillance, you have fatally undermined your claim that God is necessary for us to be good. I suspect that quite a lot of religious people do think religion is what motivates them to be good, especially if they belong to one of those faiths that systematically exploits personal guilt.
It seems to me to require quite a low self-regard to think that, should belief in God suddenly vanish from the world, we would all become callous and selfish hedonists, with no kindness, no charity, no generosity, nothing that would deserve the name of goodness. It is widely believed that Dostoevsky was of that opinion, presumably because of some remarks he put into the mouth of Ivan Karamazov:
[Ivan] solemnly observed that there was absolutely no law of nature to make man love humanity, and that if love did exist and had existed at all in the world up to now, then it was not by virtue of the natural law, but entirely because man believed in his own immortality. He added as an aside that it was precisely that which constituted the natural law, namely, that once man's faith in his own immortality was destroyed, not only would his capacity for love be exhausted, but so would the vital forces that sustained life on this earth. And furthermore, nothing would be immoral then, everything would be permitted, even anthropophagy. And finally, as though all this were not enough, he declared that for every individual, such as you and me, for example, who does not believe either in God or in his own immortality, the natural law is bound immediately to become the complete opposite of the religion-based law that preceded it, and that egoism, even extending to the perpetration of crime, would not only be permissible but would be recognized as the essential, the most rational, and even the noblest raison d'etre of the human condition.88
Perhaps naively, I have inclined towards a less cynical view of human nature than Ivan Karamazov. Do we really need policing — whether by God or by each other — in order to stop us from behaving in a selfish and criminal manner? I dearly want to believe that I do not need such surveillance — and nor, dear reader, do you. On the other hand, just to weaken our confidence, listen to Steven Pinker's disillusioning experience of a police strike in Montreal, which he describes in The Blank Slate: