 Polsby was the author of numerous articles on American politics and 15 books, including ""Political Innovation in America"" (1984), ""Congress and the Presidency"" (1986), and ""How Congress Evolves"" (2004).He was a member of the Council on Foreign Relations and a fellow of the American Academy of Arts and Sciences and the American Association for the Advancement of Science.He died February 6, 2007, in Berkeley, California, from heart disease.