Foreclosures, plant closings, offshored jobs, underwater mortgages, miserable rates of unemployment, stagnating incomes: Is there any end to the woes of the struggling American middle? Apparently not, because now comes news of a trend guaranteeing trouble ahead for the more than half of the nation that make up the moderately educated and moderately earning middle — even if the economy improves. That seismic shift, outlined in a new report from the National Marriage Project and the Institute for American Values, is towards more divorce, more out of wedlock births and, ipso facto, fewer kids with a hopeful future. Family breakdown,...