This is the first national series dedicated to examining the new American mainstream — the growing numbers of African Americans, Asians, Latinos, mixed race, immigrants, women, youth and LGBTs, whose growing purchasing power and influence over the arts, culture, commerce and the outcome of elections are affecting every aspect of contemporary life. Each half-hour program focuses on stories from every corner of the nation, amplified “by the numbers” — a distillation of the latest statistical information about population, health, education, quality of life and consumer trends.