From 9-13 May 2016, my colleagues Naomi Ellemers, Belle Derks, Daan Scheepers, Félice van Nunspeet and Frank Hindriks organized a multidisciplinary, international workshop on the Morality of Inequality. Bringing together perspectives from psychology, philosophy, economics, law, epidemiology and sociology, we spent a full week at the Lorentz center in Leiden to develop a detailed outline of a book in which societal problems relating to inequality are approached from a moral perspective. A week of discussion and integration setting the stage for lasting collaboration.