A lot has happened since this 2006 essay was posted, but as a Wikipedian I can confirm that most Wikipedia articles suffer from editing by too few editors, from too narrow a subset of the world population. And too few editors, to this day, know how to look up good sources for making articles better. (Basis of knowledge: I have won the Million Award more than once on Wikipedia for bringing a high-page-view article up to better article quality, as rated by other editors, simply by looking up good sources for the article and rewriting it from top to bottom.)