Wikipedia has become one of the most popular websites in the world, receiving 163.2 million unique visitors in December 2006 which was the 8th most visited site. This makes it the largest non-commercial website. The document discusses how Wikipedia's popularity can be explained by humanity's desire to communicate and exchange ideas freely. It operates as a self-governing online community where volunteers contribute and edit articles, following Wikipedia's policies. While disputes sometimes occur, the community resolves them without damaging the site's usefulness or popularity.