There is growing evidence that more families would opt for different schools if they could. This is clear from survey data and focus groups, from alternative-school and charter-school waiting lists, among many examples. What prevents them from sailing to a new education island is, above all, the political blockade that still seals the ports to all but a few lucky or intrepid voyagers. Visible though the new education islands and vessels may be to avid policy explorers, most people still reside on the two old continents - and don't travel much. The reasons are familiar, beginning with old-fashioned complacency about one's own school. Surveys have long shown a relatively high level of contentment - or resignation - among Americans with children in school. The familiar and nearby are often more comfortable than the distant and strange. Many interests are deeply vested in the status quo: teacher unions, textbook publishers, school board associations, colleges of education and ad...