Cass Sunstein "Radicals in Robes: Why Extreme Right-Wing Courts Are Wrong for America" (2005), "Are Judges Political? An Empirical Analysis of the Federal Judiciary" (2005), "Infotopia: How Many Minds Produce Knowledge" (2006), and, co-authored with Richard Thaler, "Nudge: Improving Decisions about Health, Wealth, and Happiness" (2008). Sunstein's 2006 book, "Infotopia: How Many Minds Produce Knowledge", explores methods for aggregating information; it contains discussions of prediction markets, open-source software, and wikis. Sunstein's 2004 book, "The Second Bill of Rights: FDR's Unfinished Revolution and Why We Need It More than Ever", advocates the Second Bill of Rights proposed by Franklin D. Roosevelt. Among these
Nudge (book) they are influenced by their social interactions. The book describes two systems that characterize human thinking, which Sunstein and Thaler refer to as the "Reflective System" and the "Automatic System". These two systems are more thoroughly defined in Daniel Kahneman's book "Thinking, Fast and Slow". The Automatic System is "rapid and is or feels instinctive, and it does not involve what we usually associate with the word "thinking"". Instances of the Automatic System at work include smiling upon seeing a puppy, getting nervous while experiencing air turbulence, and ducking when a ball is thrown at you. The Reflective System is