Speaking

FULL LIST

Nassau Presbyterian Church, Princeton, NJ, in person, June 16, 2025

The Stimson Center, Washington, DC, in person, June 12, 2025

The Quincy Institute, Washington, DC, in person, June 10, 2025

New York Military Affairs Symposium, New York, NY, on line, April 25, 2025.

Avenues the World Schools, New York, NY, in person, April 15, 2025.

Carnegie Council meeting, in person, April 15-16, 2025.

Washington Against Nuclear Weapons conference, Seattle, WA, on line, April 11, 2025.

Side event, Third Meeting of the State Parties to the Treaty on the Prohibition of Nuclear Weapons, New York, NY, in person, March 6, 2025.

Southern Utah University, speaker series, Cedar City, in person, February 20, 2025.

Initiatives pour le Désarmement Nucléaire (IDN), annual conference, Paris, France, on line, November 29, 2024.

Winnetka Presbyterian Church, in person, November 19, 2024.

Presbyterian Peace Fellowship meeting, on line, August 8, 2024.

Ban the Bomb conference, Orlando Florida, on line, August 6, 2024.

Washington Against Nuclear Weapons meeting, on line, May 9, 2024.

Emily Hollenbeck’s class, Avenues the World School, on line, May 6, 2024.

Chad Parkin’s class, Dubuque public schools, in person, April 26, 2024

Kings College London, “Myths,” January 16, 2024.

Debate: “This House believes that nuclear weapons have made the world safer,” Cambridge Union, Cambridge, UK, in person, January 15, 2024.

Chatham House, London, “Exaggerated,” in person, January 15, 2024.

Side event, Second Meeting of the States Parties to the Treaty on the Prohibition of Nuclear Weapons, Overvalued: How to Convince Nuclear Armed States, in personNovember 30, 2023.

Side event, First Committee at the United Nations, in person, book launch for It Is Possible: A Future Without Nuclear Weapons, New York, October 25, 2023.

Debate: “It is imperative to eliminate nuclear weapons,” the Soho Forum, New York, in person, September 19, 2022.

Winnetka Rotary Club, Winnetka, IL, in person, September 2, 2021.

Guest Lecture, Princeton University, Princeton, in person,NJ, September 26, 2019.

Covenant Village, Northbrook, IL, in person, September 23, 2019

Orlando Community Center, Orlando, FL, in person, August 6, 2019

MacArthur Foundation, Chicago, IL, in person, May 23, 2019.

Naval War College, Newport, RI, in person, May 8, 2019

Stimson Center, Washington, DC, in person, May 2, 2019

First Plymouth Church, Lincoln, NE, in person, April 20, 2019

Northfield Rotary, Northfield, IL, in person, March 28, 2019

New York Military Affairs Symposium, New York, in person, February 22,1019

Mexican Consulate, New York, in person, February 22, 2019

Guest Lecture at Princeton University, Princeton, NJ, in person, February 22, 2019

Lake Shore Unitarian Society, Winnetka, IL in person, January 27, 2019

North Shore Senior Center, Northfield, IL, in person, October 23, 2018

Winnetka Presbyterian Church, in person, May 31, 2018.

Pugwash France, Paris, France, in person, January 24, 2017.

Initiatives pour le Désarmement Nucléaire Conference, Paris, France, in person, January 23, 2017.

ICAN France Conference, Paris, France, in person, October 22, 2016.

Coalition for Peace Action, Princeton, NJ, in person, May 26, 2016.

Model UN, Princeton Junction, NJ, in person, April 23, 2016

Program on Science and Global Security, Princeton University, Princeton, NJ, in person February 17, 2016.

Boston Cambridge Central Square Library, Boston, MA, in person, February 16, 2016.

Guest Lecture at Princeton University, Princeton, in person, NJ, December 10, 2015.

Global Zero, Des Moines, IA, in person, November 8, 2015.

Belgian Parliament, Brussels, Belgium, in person, October 23, 2015.

GRIP, Brussels, Belgium, in person, October 21, 2015.

Assemblée Nationale, Paris, France, in person, October 20, 2015.

Sorbonne, Paris, France, in person, October 19, 2015.

PPND Conference, Senate Chamber, Czech Senate, Prague, Czech Republic, in person, October 16, 2015.

Diplomatic Academy, Prague, Czech Republic, in person, October 8, 2015.

Prague Agenda, Foreign Ministry, Prague, Czech Republic, in person, October 7, 2015.

Latin American Diplomats, Mexico City, Mexico, in person, July 17, 2015.

“Doubts about Nuclear Weapons,” Foreign Ministry of Mexico, Mexico City, Mexico, in person, July 16, 2015.

OPANAL, Mexico City, Mexico, in person, July 14, 2015.

Global Zero Action Team conference, New York, in person, May 2, 2015.

“War Will Come,” United Nations, New York, in person, April 30, 2015.

Guest Lecture, Princeton University, Princeton, in person, NJ, April 28, 2015.

Closed Seminar, Assemblée Nationale, Paris, in person, France, March 5, 2015.

French book launch, GRIP, Brussels, Belgium, in person, March 4, 2015.

NSquare, Sausalito, CA, in person, January 21, 2015.

BASIC Roundtable, London, UK, in person, December 19, 2014.

Guest Lecture, George Mason University, in person, October 21, 2014.

BASIC Roundtable, Quaker House, New York, in person, October 8, 2014.

IPPNW Conference, Astana, Kazakhstan, in person, August 27, 2014.

Lecture, Scottish National Parliament, in person, Edinburgh, Scotland, August 5, 2014.

Arrêtez la Bomb Conference, Assemblée Nationale, in person, Paris, France, June 26, 2014.

Austrian Institute for International Affairs, Vienna, in person, Austria, May 26, 2014.

Guest Lecture local high school, Vienna, Austria, in person, May 22, 2014.

Vienna Center for Disarmament and Non-Proliferation, in person, Vienna, Austria, May 22, 2014.

Middle East Free Zone side event, PrepCom, United Nations, in person, May 7, 2014.

“Deterrence Failures,” PrepCom, United Nations, New York, in person, May 1, 2014.

Science for Peace, Toronto, Canada, in person, March 25, 2014.

Central Technical School, Toronto, Canada, in person, March 25, 2014.

Conferencia CentroAmericana Para La Paz, San Jose, in person, Costa Rica, March 4, 2014.

Notre Dame Global Zero, South Bend, IN, in person, February 27, 2014.

Perry Project, Menlo Park, CA, in person, February 24, 2013.

BASIC Roundtable, London, UK, in person, December 20, 2013.

Guest lecture, Princeton University, Princeton, NJ, in person, November 25, 2013.

Community Center, Haifa, Israel, in person, November 17, 2013.

“Five Myths About Nuclear Weapons,” Hipster Bar, Tel Aviv, Israel, in person, November 16, 2013.

Seminar, Nagasaki University, Nagasaki, Japan, in person, November 5, 2013.

Nagasaki Global Citizen’s Assembly, Nagasaki, Japan, in person, November 3, 2013.

Utah Campaign to Abolish Nuclear Weapons, First Episcopal Church, Salt Lake City, Utah, in person, October 18, 2013.

Salt Lake City Book Fair, Public Library, Salt Lake City, Utah, in person, October 17, 2013.

Utah Valley University, “Nuclear Weapons: A Pragmatic Re-evaluation,” Salt Lake City, Utah, in person, October 17, 2013.

“Strengthening Nonproliferation,” Side event at the First Committee, United Nations, New York, NY, in person, October 16, 2013.

Roundtable of the American Security Project, Washington, DC, in person, October 3, 2013.

United Nations Association, Newtown, Pennsylvania, in person, September 25, 2013.

Norwegian Peoples Aid, Oslo, Norway, in person, September 17, 2013.

Norwegian Foreign Ministry, Oslo, Norway, in person, September 13, 2013.

Swiss Foreign Ministry, Bern, Switzerland, in person, September 11, 2013.

Debate with Sir Lawrence Freedman, Chatham House, London, United Kingdom, in person, July 25, 2013.

Colloquium, Naval War College, Newport, RI, in person, July 23, 2013.

Perry Foundation, Palo Alto, California, in person, June 20, 2013.

Marty Helman Group, Palo Alto, California, in person, June 20, 2013.

Books and Books, Miami, Florida, in person, June 5, 2013.

University of Costa Rica, San Jose, Costa Rica, in person, May 27, 2013.

United Nations University for Peace, San Jose, Costa Rica, in person, May 23, 2013.

Moreno Cañas Clinic, San Jose, Costa Rica, in person, May 23, 2013.

CEDAL, San Jose, Costa Rica, in person, May 22, 2013.

Mayors for Peace, San Jose, Costa Rica, in person, May 22, 2013.

National Assembly of Costa Rica, San Jose, Costa Rica, in person, May 21, 2013.

National Psychiatric Hospital, San Jose, Costa Rica, in person, May 21, 2013.

Foreign Ministry of Costa Rica, San Jose, Costa Rica, in person, May 20, 2013.

Opening address of the Open Ended Working Group, United Nations, Geneva, Switzerland, in person, May 14, 2013.

Prepcom Event, United Nations, Geneva, Switzerland, in person, April 24, 2013.

Wayzata Community Church, Wayzata, Minnesota, in person, April 11, 2013.

Unity Church, St. Paul, Minnesota, in person, April 10, 2013.

Coalition for Peace Action, Unitarian Church, Princeton, New Jersey, in person, April 7, 2013.

Global Relations Forum, Istanbul, Turkey, in person, March 26, 2013.

BASIC Gulf States Roundtable, Istanbul, Turkey, in person, March 25, 2013.

North Atlantic Treaty Association, Oslo, Norway, in person, March 7, 2013.

Defense Committee, European Parliament, Brussels, in person, Belgium, March 6, 2013.

Parliamentarians for Nuclear Nonproliferation and Disarmament, Stortinget, Oslo, Norway, in person, March 4, 2013.

ICAN conference, Oslo, Norway, in person, March 3, 2013.

Norwegian Youth Party Conference, Oslo, Norway, in person, February 28, 2013.

Norwegian Peoples’ Aid Society, Youth Conference, Oslo, Norway, in person, February 27, 2013.

A-10 Directorate, the Pentagon, Washington, DC, in person, February 22, 2013.

Book launch event, United Nations, New York, New York, in person, February 20, 2013.

American University, Washington, DC, in person, February 14, 2013.

Harvard Bookstore, Cambridge, Massachusetts, in person, January 29, 2013.

Managing the Atom, John F. Kennedy School, Harvard University, in person, January 28, 2013.

Books Inc. Berkeley, CA, in person, January 24, 2013.

Kepler’s Books, Palo Alto, CA, in person, January 23, 2013.

Stimson Center, Washington, DC, in person, January 18, 2013.

U.S. State Department, Washington, DC, in person, January 18, 2013.

Politics and Prose Bookstore, Washington, DC, in person, January 17, 2013.

Carnegie Council for Ethics in International Affairs, New York, NY, in person, January 16, 2013.

55 Plus, Princeton, NJ, in person, January 3, 2013

King’s College, London, UK, in person, December 13, 2012.

Top Level Group, Portcullis House, London, UK, in person, December 12, 2012.

Old Guard Club, Princeton NJ, in person, December 7, 2012.

Program on Science and Global Security, Princeton University, Princeton, NJ, in person, November 21, 2012.

Old Guard, Friend Center, Princeton University, Princeton, NJ, in person, November 7, 2012.

European Leadership Network, Dubrovnik, Croatia, in person, September 16, 2012.

Parliamentarians for Nuclear Nonproliferation and Disarmament, Astana, Khazakstan, in person, August 29, 2012.

Ploughshares Fund, San Francisco, CA, in person, June 12, 2012.

Fallsington Friends Meeting, Fallsington, PA, in person, June 6, 2012.

Debate with Chris Ford, Nuclear Abolition Forum, Washington, DC, in person, May 9, 2012.

Center for Nonproliferation Studies, Monterey, CA, in person, April 12, 2012.

“Pragmatic Doubts About Nuclear Weapons,” The Brookings Institution, Washington, DC, in person, April 4, 2012.

“The Cost of Nuclear Weapons,” Lower But Coalition for Peace Action, Levittown, PA, in person, March 25, 2012.

George Washington University, Washington, DC, in person, February 17, 2012.

Princeton University, Princeton, NJ, in person, December 8, 2011.

Stockholm University, Stockholm, Sweden, in person, November 29, 2011.

Stockholm International Peace Research Institute (SIPRI), in person, November 25, 2011.

IPPNW, Stockholm, Sweden, in person, November 25, 2011.

Policy Planning Seminar, World Council of Churches, Edinburgh, Scotland, in person, November 18, 2011.

International Law Policy Institute, Oslo, Norway, in person, November 17, 2011.

“Nuclear Weapons and Our Globalizing Century,” CCCU webinar, Trenton, NJ, in person, October 20, 2011.

Pugwash, London, UK, in person, September 29, 2011.

Humanitarian Impact meeting, Amersham, United Kingdom, in person, September 28, 2011.

International Campaign to Abolish Nuclear Weapons (ICAN) Conference, Geneva, Switzerland, in person, September 18, 2011.

Center for Security and International Studies (CSIS), Washington, DC, in person, May 17, 2011.

Lower Bucks Coalition for Peace Action, Pennswood, PA, in person, May 1, 2011.

East/West Institute, New York, in person, April 29, 2011.

Evergreen Forum, Princeton, in person, NJ, April 25, 2011.

Hamburg University, Hamburg, Germany, in person, April 18, 2011.

Oslo University, Oslo, Norway, in person, April 14, 2011.

Christian Michelsen's Institute on International Development and Policy, Bergen, Norway, in person, April 13, 2011.

University of Massachusetts/Amherst, Amherst, Massachusetts, in person, April 5, 2011.

Hampshire College, Amherst, Massachusetts, in person, April 4, 2011.

The International Network of Emerging Nuclear Specialists (INENS), Washington, DC, in person, March 27, 2011.

Southeast Asia Workshop, Christchurch, New Zealand, in person, February 17, 2011.

Guest Lecture, Princeton University, Princeton, NJ, in person, December 16, 2010.

International Law Policy Institute, Oslo, Norway, in person, December 9, 2010.

Norwegian Institute of International Affairs, in person, December 9, 2010.

Institute for Defense Studies, Oslo Norway, in person, December 9, 2010.

Nuclear Weapons Study Group, Oslo, Norway, in person, December 8, 2010.

UN NGO Association, United Nations, New York, NY in person,, December 6, 2010.

“Stable at Zero,” Center for Nonproliferation Studies, Monterey, CA, in person, November 30, 2010.

Monroe Chapter, Coalition for Peace Action, Monroe, NJ, in person, November 17, 2010.

Pugwash, London, United Kingdom, in person, November 4, 2010.

Council on Christian Approaches to Defense and Disarmament, London, UK, in person, November 4, 2010.

United Nations Association, London, United Kingdom, in person, November 3, 2010.

House of Commons, London, United Kingdom, in person, November 2, 2010.

Aberystwyth University, Aberystwyth, Wales, in person, November 1, 2010.

University of Pretoria, Pretoria, South Africa, in person, October 28, 2010.

Monash University, Roodepoort, South Africa, in person, October 14, 2010.

Institute for Strategic Studies (ISS), Pretoria, South Africa, in person, October 13, 2010.

BuxMont Coalition for Peace Action, Newtown, PA, in person, August 6, 2010.

Coalition for Peace Action, Princeton, NJ, in person, August 5, 2010.

Rotary Club, Etowah, TN, in person, July 29, 2010.

Rotary Club, Chattanooga, TN, in person, July 28, 2010.

Rotary Club, Nashville, TN, in person, July 27, 2010.

Editorial Board of the Nashville Tennessean, Nashville, Tennessee, in person, July 15, 2010.

“Delegitimizing Nuclear Weapons,” NPR RevCon side event, United Nations, New York, in person, May 10, 2010.

“Rethinking Nuclear Weapons,” Federation of American Scientists, Washington, DC, in person, May 7, 2010.

Georgetown University Lecture Fund, Washington, DC, in person, April 14, 2010.

BuxMont Coalition for Peace Action, Newtown, PA, in person, April 11, 2010.

Day-long seminar on “Delegitimizing Nuclear Weapons” with members of the Swiss Foreign Ministry and other invited guests. Nyon, Switzerland, in person, March 8, 2010.

Program on Science and Global Security, Princeton University, Princeton, NJ, in person, February 17, 2010.

St. Andrews Church, Yardley, PA, in person, January 24, 2010.

Presentation as part of the press conference announcing Elements of a Nuclear Disarmament Treaty. Washington, DC, in person, January 21, 2010.

UN Fellows Program, United Nations, New York, in person, October 22, 2009.

Princeton University, Princeton, NJ, in person, September 9, 2009.

Philadelphia Coalition for Peace Action, Philadelphia, PA, in person, September 9, 2009.

Monroe Twp. Coalition for Peace Action, Jamesburg, NJ, in person, June 17, 2009.

BuxMont Coalition for Peace Action, Newtown, PA, in person, June 14, 2009.

Seminar, Georgetown University, Washington, DC, in person, April 24, 2009.

Program on International Security Policy, University of Chicago, Chicago, IL, in person, April 14, 2009

Dowling College, Oakdale, NY, in person, March 16, 2009

Program on Science and Global Security, Princeton University, Princeton, NJ, in person, March 11, 2009

Naval War College, Newport, RI, in person, December 1, 2008

Nonproliferation Review, “NPR Luncheon Briefing: Winners of the 2008 Doreen and Jim McElvany Nonproliferation Challenge Essay Contest," Washington, DC, in person, November 12, 2008

Monterey Institute, James Martin Center for Nonproliferation Studies, in person, November 7, 2008

Stanford University, Center for International Security and Cooperation, Palo Alto, CA, in person, November 6, 2008

The New School, New York, NY, in person, October 17, 2008

The New America Foundation, Washington, DC, in person, July 27, 2008

Los Alamos Committee on Arms Control and International Security, Los Alamos, NM, in person, April 24, 2008.

George School, Newtown, PA, in person, April 2, 2008

Institute for Advanced Study, Seminar, Princeton, NJ, in person, December 9, 2007

Naval War College, Newport, RI, in person, December 4, 2007

Office of Disarmament Affairs, United Nations, New York, NY, in person, August 17, 2007

Project for Nuclear Awareness, Philadelphia, PA, in person, August 10, 2007 and August 12, 2007

The Stimson Center, Washington, DC, in person, April 24, 2007

Coalition for Peace Action - Monroe chapter, in person, Monroe, NJ, March 28, 2007

St. Andrews Church, Yardley, PA, in person, February 18, 2007

Episcopal Academy, Philadelphia, PA, in person, January 30, 2007

Tzedek v' Shalom, Newtown, PA, in person, January 6, 2007

Princeton Public Library, Princeton, NJ, in person, July 12, 2006

Home of Kevin Ellis, Marlton, VT, in person, June 6, 2006

Program on Science and Global Security, Princeton University, Princeton, NJ, in person, Jan 10, 2006.