Cass Sunstein has been regarded as one of the country’s most influential and adventurous legal scholars for a generation. His scholarly articles have been cited more often than those of any of his peers ever since he was a young professor. At 60, now Walmsley University Professor at Harvard Law School, he publishes significant books as often as many productive academics publish scholarly articles—three of them last year. In each, Sunstein comes across as a brainy and cheerful technocrat, practiced at thinking about the consequences of rules, regulations, and policies, with attention to the linkages between particular means and ends. Drawing on insights from cognitive psychology as well as behavioral economics, he is especially focused on mastering how people make significant choices that promote or undercut their own well-being and that of society, so government and other institutions can reinforce the good and correct for the bad in shaping policy. Lincoln Caplan, harvardmagazine.