John Roemer is an economist and professor of political science at Yale who is serving as a lead author for Chapter 8: Social Justice, Well-Being and Economic Organization. In this interview, he explains how cooperation and social ethos can help frame a market system that seeks to equalize opportunity for its constituents and minimize disparities in wealth distributions. He also explains how economic theories shape opinions about social progress and discusses the potential for the IPSP to propose a blueprint for a more cooperative society.