"Because communities of practice are voluntary, what makes them successful over time is their ability to generate enough excitement, relevance, and value to attract and engage members. Although many factors, such as management support or an urgent problem, can inspire a community, nothing can substitute for this sense of aliveness."

BBC NEWS | Programmes | State Of The Union: The Evangelical vote: "Karl Rove, the president's chief political adviser, famously said that the key to this election was turning out four million evangelical Christians who did not vote in the year 2000.

"Well, this year - unlike four years ago - Mr Bush won the popular vote. And his margin was just short of four million voters.

"Now, it would be foolish to assume that all those 3.5 million voters were evangelical Christians. They were not.
Mr Bush got some defections from the growing Hispanic vote - which usually trends Democratic - and he made gains among Catholics and in the Jewish community.

"But the core of the president's support was Christian conservatives. "

A Look at the Invisible Hand (Harpers.org)