There have been a lot of posts in the blogosphere about Harvard Professor Robert D. Putnam’s the recent finding that diversity (at least in the short to medium-term) challenges community cohesion. The underlying well-written article that caused all thus controversy is available here.
There are some very interesting blog posts on these two sites.
Robert Putnam discussed these issues further with Lani Guinier and Pat Buchanan on Tom Ashbrook’s On Point radio show (8/9/07).
And while there has not been much scholarly critique of Putnam’s findings, one outspoken academic critic is Steven Durlauf who claims in a letter published on a blog post that the low social capital folks moved to the places with greater diversity (a self-selection argument that seems rather counter-intuitive, i.e. that the least trusting move to the places with greater diversity and the most trusting leave for places with greater homogeneity).