"Talk of politics in the United States today is abuzz with warring red and blue factions. The message is that Americans are split due to deeply-held beliefs--over abortion, gay marriage, stem-cell research, prayer in public schools. Is this cultural divide a myth, the product of elite partisans? Or is the split real? Yes, argue authors Mark Brewer and Jeffrey Stonecash--the cultural divisions are real. Yet they tell only half the story. Differences...