- Chapter, “Die Kirchen in den Vereinigten Staaten,” in Die Vereinigten Staaten von Amerika: Geschichte, Probleme, Perspektiven, Würzburg, Verlag Ploetz, 1976.
- Report on participation in the 1999 Jesse Jackson expedition (only catholic member) to Belgrade during the Kosovo War to gain the freedom three American soldiers captured by the Serbs, Faxed to Angelo Cardinal Sodano, Vatican Secretary of State, may 20, 1999.
- “Ethical Issues About the Kosovo War,” a Discussion at Hartford Seminary, September 21, 1999.
- “Ignatius of Antioch on the Role of the Bishop,” originally given as a talk at St. Andrew’s Theological College, Moscow, May 31, 2002
- Report to Walter Cardinal Kasper, President of the Pontifical Council for the Promotion of the Unity of Christians, on discussion with Archpriest Svevelod Chaplin, Vice Chairman of the Department of External Church Relations of the Russian Orthodox Church, on the damaged relations between Catholics and the Russian Orthodox Church, June 17, 2002.
- “Develop a Global Partnership for Development,” talk in the Series “Millennium Development Goals,” Sherrill Hall, Episcopal Divinity School, December 1, 2005.
- International Encyclopedia of the Social Sciences, 2nd edition, entry “Reconciliation,” 2006.
- The Antioch Agenda: Essays on the Restorative Church in Honor of Orlando Costas, eds. Daniel Jeyaraj, Robert, W. Pasmino and Rodney S. Petersen, Helmick chapter “The Context of Group Identities and their Conflicts: A Four-Factor Theory of the Dynamic of Conflict” (New Delhi, printed by the Indian Society for the promotion of Christian Knowledge for Andover Newton Theological School and the Boston Theological Institute, 2007).
- Human Development, 2008, “The ‘Hard Men’ as Peacemakers in Northern Ireland.”
- “Secrets of Successful Mediation at Home and Abroad,” talk to the Kurdish Cultural Center, Washington, D.C., January 29, 2009.
- “Talk to Adversaries,” address, Goddard Chapel, Tufts University, February 4, 2009.
- “Memo on the Middle East,” addressed to President Obama, April 28, 2009.
- “A Taxonomy of Religions,” February 12, 2012,
- “Just Peace in past and Present Context: Climate Change as Threat to Peace and Future,” Reykjavic, University of Iceland, May 3, 2014. Proposal for a WCC Conference on Just Peace, to be held in Iceland.
- “The Effects of Religion in Conflicts,” November 1, 2014.