Paul Pierson is the John Gross Professor of Political Science at the University of California at Berkeley. He is the author of Politics in Time, Dismantling the Welfare State?, and (with Jacob S. Hacker), American Amnesia: The Forgotten Roots of Our Prosperity; Winner-Take-All Politics: How Washington Made the Rich Richer—and Turned Its Back on the Middle Class; Off Center: The Republican Revolution and the Erosion of American Democracy. His commentary has appeared in The New York Times Magazine, The Washington Post, and The New York Review of Books. He lives in Berkeley, California.