Wikipedia is certainly no stranger to conflict - there are regular "edit wars," where people repeatedly remove each other's contributions, and prolonged disputes in which editors are unable to agree on an article's content.
But the relative lack of adult supervision on Wikipedia has encouraged people to settle disputes through consensus rather than conflict. The process is often messy, but Wikipedia's popularity is proof that it works. "Some sites have a lot of controls to prevent bad behavior," Wales says. "But they end up preventing spontaneous good behavior."