Martin Ruef is the Jack and Pamela Egan Professor in the Department of Sociology at Duke University. His research projects examine the historical evolution of segregation, labor market institutions, and entrepreneurship. He is the author of The Entrepreneurial Group (2010) and Between Slavery and Capitalism (2014), both published by Princeton University Press, and is a co-author of Organizations Evolving (2020, 3rd edition), published by Edward Elgar.Angelina Grigoryeva is an Assistant Professor in the Department of Sociology at the University of Toronto. Her research interests include inequality and stratification, economic sociology, social demography, and quantitative and computational methodology. Her research examines the social history of segregation and inequality by race, gender, and wealth.