Public discourse on economics in the United States, and around the world, often focuses on rising income and wealth inequality. The "Occupy" movement drew great attention to the rising fortunes of the top one percent while middle- and lower-income Americans lost ground. Vast scholarly, political, and media attention is focused on issues of growing inequality and implications for broader societal cultural shifts as well as economic growth. Less attention has been paid to the changing landscape of opportunities enabling youth to get ahead, to improve their living situation over that of their parents through hard work and determination. Such social mobility has remained fairly stable for generations, but recent evidence across a range of indicia suggests growing gaps in the opportunities available to children in lower socioeconomic status families versus those in families of higher socioeconomic strata. This pushes the American Dream—or the idea that anyone who works hard, and plays by the rules, can get ahead—further out of reach. Such inequality is a potential threat to our social structure as well as our economic well-being.