In 1980, the richest 1 percent of New Yorkers received about 12 percent of income in the city. In 2007, they received 43 percent. As income inequality has grown nationwide and across New York State, the city has led the way—exposing its strengths and weaknesses, raising questions about fairness and social cohesion. This series explores the complex effects income inequality has on day to day life the five boroughs, the challenges it causes and the choices it poses for the next mayor of New York.