"The white populations of the District, Arlington and Alexandria have grown this decade even as the region's outer counties have grown more diverse, according to new census estimates," according to a story in yesterday's Washington Post. As a part-time resident of DC, I was curious about the Post's take on the idea of what constitutes increasing or decreasing diversity in any community. The Post noted that the percentage of whites living in town rose from 28.2 percent in 2000 to 30.3 percent in 2004. My puzzlement is whether this represents an increase in "diversity" or not? Or as the Post story seems to imply, is "diversity" maximized when no white people live in a community at all? Just wondering.