Income inequality, which is the income gap between rich and poor, has widened steadily for the past fifty years in the United States. This gap affects women, immigrants, and racial and ethnic minorities most, and it can create problems that ripple through many aspects of our lives for generations to come. Why does income inequality exist, how does it affect our society, and how can we address it? The wide-ranging viewpoints in this volume explore these questions and provide important explanations and context for this complicated issue.