More than half of humanity now resides in cities. By 2050, this number is expected to double, creating an unprecedented level of urban growth. Will these cities be places of justice and equality, where prosperity and quality of life are available to all? Or will the urban future be one in which cities benefit the global 1 percent at the expense of the many, where growth and opportunity are coupled with exclusion and repression? The rising level of urban unrest worldwide may be a sign of the direction in which cities are moving.