Economist Thomas Piketty details the policies he believes will be key to overcoming the wealth inequality illustrated in his seminal 2013 book, “Capital in the Twenty-First Century.” He also discusses the 2018 World Inequality Report, which builds on and updates the data sets first featured in “Capital,” except on a global scale thanks to the involvement of more than one hundred economists around the world. Piketty was on campus to deliver the Wiener Center’s inaugural Stone Lecture on Economic Inequality.