How they work...

How Wikipedia makes the cut...

... One of the remarkable achievements of Wikipedia is to show that on the internet Gresham’s Law can work in reverse: Wikipedia has turned into a relatively reliable source of information on the widest possible range of subjects because, on the whole, the good drives out the bad. When someone sabotages or messes with an otherwise sound entry, there are plenty of people out there who see it as their job to undo the damage, often within seconds of its happening. It turns out that the people who believe in truth and objectivity are at least as numerous as all the crazies, pranksters and time-wasters, and they are often considerably more tenacious, ruthless and monomaniacal. On Wikipedia, it’s the good guys who will hunt you down.

Jimmy Wales thinks this tells us something surprising and reassuring about human nature. ‘Generally we find most people out there on the internet are good,’ he says. ‘It’s one of the wonderful humanitarian discoveries in Wikipedia that most people only want to help us and build this free, non-profit, charitable resource.’ But in truth it’s a bit more complicated than that. Wikipedia works because it is highly distinctive in the way it pulls knowledge together from many different sources. Most internet-based techniques for gathering information are aggregative, in that they try to pool as much information as possible, allowing all the prejudices and random bits of disinformation that attach to individual opinions to cancel each other out. This is true of the many different kinds of polling that take place on the internet, which use the wisdom of crowds to produce answers far more accurate than any individual can give. It’s also pretty much what happens at Google, where everybody else’s searches are monitored to help filter the information that you might find useful. Aggregative methods minimise personal responsibility for what is produced and place all the emphasis on collective outcomes – after all, who knows, or cares, what their own Google searches are adding to the sum of knowledge (or subtracting from it)? However, Wikipedia’s approach to knowledge gathering is not aggregative but cumulative. It builds up information bit by bit, edit by edit, and it never stops. It also leaves a virtual paper trail for every entry, so that it is possible to trace the various steps by which an article has reached its current form.