Society is not just the product of its individual members; it is also the product of its constituent groups… — Clay Shirky

Because Wikipedia is a process, not a product, it replaces guarantees offered by institutions with probabilities supported by process: if enough people care enough about an article to read it, then enough people will care enough to improve it, and over time this will lead to a large enough body of good enough work to begin to take both availability and quality of articles for granted, and to integrate Wikipedia into daily use by millions.

We use the word "organization" to mean both the state of being organized and the groups that do the organizing... We use one word for both because, at a certain scale, we haven't been able to get organization without organizations; the former seems to imply the latter.

The typical organization is hierarchical, with workers answering to a manager, and that manager answering to a still-higher manager, and so on. The value of such hierarchies is obvious-it vastly simplifies communication among the employees. New employees need only one connection, to their boss, to get started. That's much simpler than trying to have everyone talk to everyone.