Unidentified Activist
Unidentified Activist campaign leader

In his book, "Capital in the Twenty-First Century", Thomas Piketty discusses the issue of income inequality, and why we must decrease income disparities. He addresses specifically that this is a major problem in the United States.

If you are interested in reading his book, you can find it here:
http://www.amazon.com/Capital-Twenty-First-Century-Thomas-Piketty/dp/067443000X

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