The "American Dilemma," Gunnar Myrdal called the problem of race in his classic 1944 book. More than half a century later, race remains the issue that dwarfs all others - the problem that doesn't get solved and won't go away. But in the decades since Myrdal wrote, much has changed, say the authors of America in Black and White. Progress - too little acknowledged - has been heartening. Pessimists talk of the "permanence of racism," and say that things...