In 1966, Nobel Laureate Joseph Stiglitz wrote his PhD thesis on inequality. Almost sixty years later, after decades of research, numerous books, and international acclaim, he has led a new report for the upcoming G20 summit in South Africa, warning that the world is now confronting an “inequality emergency.” GUEST: Nobel Laureate Economist, former chief economist of the World Bank, and Professor at Columbia University, Joseph Stiglitz. PRODUCER: Ali Benton