If so, congratulations: you have just confounded classical economics, which says that no rational person should ever reduce their own income just to slash someone else's. And yet that's exactly what we do. Classical economics, it turns out, is a pretty terrible predictor of how we actually behave.
But why do we inflict pain for no gain? On the face of it, it is rather a mean way of going about things. Does spitefulness stem from an upset sense of fairness? Or something altogether darker: envy, lust for revenge - or perhaps even pure aggression?
It might be all those things. Economists, anthropologists and evolutionary biologists have been teasing out how, used with caution, spiteful behaviour can be one of our best weapons in maintaining a fair and ordered society. But intentions that are noble in one situation can be malicious in another - making spite a weapon that can all too easily backfire into persist inequality.
Human spite is a complex affair. It is not pure selfishness in the Darwinian sense, like a stag that picks a fight with another. Though it might be gored in the process, the stag is actually acting in its own best interests. If it ends up with more mates, then the chances of passing on its genes are increased, an evolutionary prize worth fighting for.
Nor is spite as we practice it true spite in the biologist's sense. That would involve diminishing our own evolutionary fitness just so we can lower that of some unrelated individual. That behaviour exists, but it is hard to come by, says Stuart West, an evolutionary biologist at the University of Oxford. There is a particular type of freeloading wasp, for example, some of whose larvae do not develop into adults capable of reproduction, but instead kill unrelated larvae of the same species, freeing up resources for their siblings. And in several types of bacteria, spiteful cells produce chemicals that kill both themselves and other members of their kind, unless they carry a genetic marker of relatedness to the suicidal individual. That makes microbes the kings of true spite, says West.
Human spite is something altogether subtler. Psychological motivations and social contexts influence our course of action. That requires a very special set of circumstances and skills, says Marc Hauser, a biologist at Harvard University. First, it needs a stable social grouping in which unrelated individuals interact regularly, and in which costs incurred retain relevance. What's more, you must also be able to spot when you're getting a raw deal, identify the guilty party, and be willing to do something about it.
That requires what Hauser has dubbed "floodlight" intelligence - the ability to see the big picture and combine many cognitive inputs over time. That, he suggests, might make both spite and reciprocity - the doing and returning of favours - uniquely human qualities. The "laser-beam" intelligence of most animals might be superb at solving individual problems, but it is simply not good enough at generalising experience to develop such complex behaviours in spite of our uniquely human qualities.
Naughty but nice
If that's true, the floodlight is switched on at an early age. At a meeting of London's Royal Society in January, Hauser reported preliminary results from experiments in which children between 4 and 8 years old were offered varying numbers of sweets for themselves and another child unknown to them. They had to pull either a lever delivering the sweets, or another that tipped the sweets out of reach. Infants of all ages almost always rejected one sweet for themselves if the other child was set to receive more. The older children often also rejected sweets if they got more than the other child. Where that kind of concern about inequality disappears to is unclear, because we adults certainly don't have it. Imagine you have four pound on your side, and there's one on the other side. It's highly unlikely that you'll dump your four pounds." But the negative, spiteful version persists: most of us would be quite prepared to sacrifice a pound to stop someone else getting four. Spite is the ugly sister of humanity.
What motivates this emotive behaviour? A clue is provided by laboratory experiments known as public goods games. In a standard public goods game, each participant is given the same amount of money, some or all of which they can pay into a common pot. What's in the pot is then multiplied by the experimenters and divided equally between the players, so that even those who put in nothing get a share of its contents. The best outcome for all is if everyone puts their cash into the pot. But that does not naturally happen. In repeated rounds of the game, some individuals hold on to their own cash and hope to leech off other people.
- What is our understanding of this for Equality and Diversity?
- What do you think?
- Does it matter?
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