Kathryn Sikkink is the Ryan Family Professor of Human Rights Policy at the Harvard Kennedy School and the Carol K. Pforzheimer Professor at the Radcliffe Institute for Advanced Study. Sikkink works on international norms and institutions, transnational advocacy networks, the impact of human rights law and policies, and transitional justice. Her publications include Evidence for Hope: Making Human Rights Work in the 21st Century; The Justice Cascade: How Human Rights Prosecutions are Changing World Politics; Mixed Signals: U.S. Human Rights Policy and Latin America; Activists Beyond Borders: Advocacy Networks in International Politics; and The Persistent Power of Human Rights: From Commitment to Compliance (co-edited with Thomas Risse and Stephen Ropp). She holds a PhD in political science from Columbia University. Sikkink has been a Fulbright Scholar in Argentina and a Guggenheim fellow.