David Koch is one-half of politically and economically powerful duo known as the Koch brothers. He and his brother, Charles, are tied in sixth place on the list of the wealthiest men on the planet.
Phelan M. Ebenhack/AP
May 21, 2014 Charles and David Koch have spent hundreds of millions of dollars trying to bring their libertarian views into the mainstream. In a new book, Daniel Schulman looks at the roots of their ideology.
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