dogs:kids vs. political inclinations

"What's the difference between Seattle and Salt Lake City?" writes Phillip Longman in USA Today. "There are many differences, of course, but here's one you might not know. In Seattle, there are 45 per cent more dogs than children. In Salt Lake City, there are nearly 19 per cent more kids than dogs. This curious fact . . . reflects a much broader and little-noticed demographic trend that has deep implications for the future of global culture and politics. It's not that people in a progressive city such as Seattle are so much fonder of dogs than are people in a conservative city such as Salt Lake City. It's that progressives are so much less likely to have children."
-- globeandmail.com