Please visit Pugwash Conferences on Science and World Affairs for this tribute to Amb. (ret) Jayantha Dhanapala, a distinguished diplomat and advocate for nuclear disarmament who received The Simons Foundation Award for Distinguished Global Leadership in the Service of Peace and Disarmament for his contributions to nuclear disarmament, particularly as Chair of the 1995 Nuclear Non-Proliferation Conference and also served as the 2008 Simons Visiting Chair in International Law and Human Security at the School for International Studies, Simon Fraser University.