The polarisation of American politics is a common subject of discussion. A recent Economist article suggests that “Americans are increasingly choosing to live among like-minded neighbours. This makes the culture war more bitter and politics harder.”
Where you live is partly determined by where you can afford to live, of course. But the “Big Sort” does not seem to be driven by economic factors. Income is a poor predictor of party preference in America; cultural factors matter more. For Americans who move to a new city, the choice is often not between a posh neighbourhood and a run-down one, but between several different neighbourhoods that are economically similar but culturally distinct.
For example, someone who works in Washington, DC, but wants to live in a suburb can commute either from Maryland or northern Virginia. Both states have equally leafy streets and good schools. But Virginia has plenty of conservative neighbourhoods with megachurches and Bushites you’ve heard of living on your block. In the posh suburbs of Maryland, by contrast, Republicans are as rare as unkempt lawns and yard signs proclaim that war is not the answer but Barack Obama might be.
Because Americans are so mobile, even a mild preference for living with like-minded neighbours leads over time to severe segregation. An accountant in Texas, for example, can live anywhere she wants, so the liberal ones move to the funky bits of Austin while the more conservative ones prefer the exurbs of Dallas. Conservative Californians can find refuge in Orange County or the Central Valley.
Over time, this means Americans are ever less exposed to contrary views. In a book called “Hearing the Other Side”, Diana Mutz of the University of Pennsylvania crunched survey data from 12 countries and found that Americans were the least likely of all to talk about politics with those who disagreed with them.