
The main areas of interest of Youssef Kamal El-Hage encompass, on the one hand, the scientific work of Albert Einstein together with the history and epistemology of modern physics and recent classical physics, and, on the other hand, the social doctrine of the Catholic Church, the theory and observance of human rights, the national and international Christian-Muslim dialogue, and the national and international ecumenical concordance. El-Hage's most recent book (2004) was an extensive study, with a translation into Arabic, of the encyclical Pacem in Terris of Pope John XIII. Another book (1999) was a historical, contextual and conceptual analysis of the Universal Declaration of Human Rights (1948), with a new translation into Arabic. He is currently conducting research in two directions: the epistemological and philosophical significance of Albert Einstein's scientific work, and the impact of the social doctrine of the Church on the promotion of Christian-Muslim understanding and the ecumenical dialogue. He was a main framer and appointed expert of the Maronite Patriarchal Synod of 2003-2006, for the final proceedings of which he contributed two important documents. In his capacity as “consultor” to the pontifical “Commission for Religious Relations with Muslims” affiliated to the “Pontifical Commission for Interreligious Dialogue” (2000-2010), and as catholic member of the “Joint Working Group” between the Catholic Church and the Word Council of Churches (2006-2013), he is regularly and actively engaged in the promotion of Christian-Muslim convivence and Christian unity at the international level and has contributed many studies in these fields. He is presently a main contributor in the team officially entrusted with the translation of the seminal Compendium of the Social Doctrine of the Church into Arabic, and is also actively working on the publication of the complete works of the late Lebanese philosopher Kamal Youssef El-Hage.

Dr. rer. nat. in Applied Nuclear Physics, Technische Universität München, Germany, 1990.
Doctorat de 3ème cycle Experimental Nuclear Physics, University of Paris XI, France, 1978.
M.A. in Philosophy, Lebanese University, 1985
Books
El-Hage, Y. K. ed. (2006) Kamal Youssef El-Hage after thirty years: a memorial book. Jounieh: The Modern Kreim Press.
El-Hage, Y.K. (2004). Pacem in Terris: Introduction, analysis and translation into Arabic. Beirut: Publications of the Movement “Justice and Love” (Monograph series n.1; Social Doctrine of the Church).
El-Hage, Y. K. ed. (2003) Wise builder…good pastor: Abbot Boulos Najm. Jounieh: The Modern Kreim Press.
El-Hage, Y.K. (1999) Human Rights: Overtopping, but not overtopped. Beirut: Publications of the “Friedrich Naumann Stiftung” and the “René Mouawad Foundation”.
Articles or Chapters in Books
El-Hage, Y.K. (2006) Religious liberty: a universal human right. In Pontifical Council for Interreligious Dialogue (Ed.), Religious Liberty: A Theme for Christian-Muslim Dialogue (pp. 11-32). Vatican City: Tipografia Vaticana.
El-Kazzi, N., & El-Hage, Y. K. (2006) Kamal Youssef El-Hage: an annotated bibliography of his books, lectures, translations, and manuscripts. In Y.K. El-Hage (Ed.), Kamal Youssef El-Hage after thirty years: a memorial book (pp. 134-153). Jounieh: The Modern Kreim Press.
El-Hage, Y. K. (2006) A life history along the line of crests. In Y.K. El-Hage (Ed.), Kamal Youssef El-Hage after thirty years: a memorial book (pp. 33-36). Jounieh: The Modern Kreim Press.
El-Hage, Y. K. (2003) The wise builder in the Lord’s vineyard. In Y.K. El-Hage (Ed.), Wise builder…good pastor: Abbot Boulos Najm (pp. 46-61).Jounieh: The Modern Kreim Press.
Refereed Journal Articles
El-Hage, Y.K. (2004) The importance of self-criticism and fighting the other’s stereotyping in Christian-Muslim relations: A Catholic perspective. Islamochristiana 30, pp. 97-110.
El-Hage, Y.K. (2004) Human rights: A western, Christian invention? Theological Review XXV/2, pp. 3-19.
El-Hage, Y.K. (1998) The international instruments on human rights. Al-Abhath XLVI, pp. 115-150.
El-Hage, Y., Wagner, U., Wagner, F.E., Riederer, J., Echt, R., & Hachmann, R. (1990). Mössbauer study of ceramic finds from the Early Phoenician palace in Kamid El-Loz, Lebanon. Hyperfine Interactions 57, pp. 2173-2178.
Gebhard, R., Bischof, H., El-Hage, Y., Riederer, J., Wagner, U., Wagner, F.E., & Wippern, A.M. (1988/1989). Early ceramics from Canapote, Colombia, studied by physical methods. Proceedings of the British Academy 5, pp. 17-34.
Galès, S., El-Hage, Y., Schapira, J-P., Fortier, S., Laurent, H., & Maison, J-M. (1980). High-spin analog resonances near the N = 50 neutron shell. Physical Review C1, pp. 98-115.
Galès, S., El-Hage, Y., Fortier, S., Laurent, H., Maison, J-M., Schapira, J-P., & Foster, J.L. (1978). Proton decay of T> hole states in heavy nuclei by means of the (3He,αp) reaction on 96Zr and 114Sm. Physical Review C17, pp. 1308-1314.
Conference Proceedings
El-Hage, Y.K., (2007) Libanon als Heimat und Libanon als “Botschaft” (Lebanon as a country and Lebanon as a "message"). Invited lecture presented at the Katholische Akademie von Bayern, 7 March 2007, Munich, Germany. München: Zur Debatte 2/2007, pp.38-41.
El-Hage, Y.K., (2006) Which secular-ness? Which covenant-ness? Lecture presented within an academic lecture series on "New Lebanon facing old questions", November 2005-May 2006, Antonine University, Baabda, Lebanon. Antonine University Press (2006), pp. 43-52.
El-Hage, Y.K., (2006) Global Positioning System (GPS): A Contribution from Physics towards a Better Quality of Life. PPT-Lecture presented within the “Science and Society Lecture Series: The Sciences Contribution to the Quality of Life”, March-June, Beirut: Notre Dame UniversityPress.
El-Hage, Y.K., (2005) About justice and peace in Lebanon: a report. Proceedings of the “Fifteenth Conference of the Council of the Oriental Catholic Patriarchs” on Justice and Peace in the Middle East, 17-20 April 2005, Amman, Jordan. Bkerkeh, Lebanon: General Secretariat of the Council, pp. 108-115.
El-Hage, Y.K., (2005) What faith? What relationship with God? Some thoughts about religion and man’s identity. Proceedings of the Conference on God and man between destiny and becoming, 18-19 February, Lebanese Center for Societal Research. Beirut: Notre Dame University Press, pp. 127-138.
El-Hage, Y.K., (2005) The Stature of Islam and Muslims as embodied in the Pontificate of Pope John Paul II. Proceedings of the “Seventeenth General Conference of the Higher Council for Islamic Affairs on the Humanity of Islamic Civilization”, 17-20 April 2005, Cairo, Egypt. HCIA Publications, pp. 40-56.
El-Hage, Y.K., (2005) The meaning of the Eucharist in the life of the faithful. Conference on Eucharist in the life of the Church” on the occasion of the Year of the Eucharist 2005, 19 November, The Holy Spirit University of Kaslik, Lebanon. Beirut: The Friends of the Eucharist 11, pp. 16-18.
El-Hage, Y.K., (2004) Religions facing the challenge of peace from a Christian perspective. Proceedings of the Second International Conference on Dialogue among Religions, 27-29 May, Doha, Qatar. Dar al-Moustaqbal al-Arabi, pp. 38-44.
El-Hage, Y.K., (2005) Einstein and Religion. Proceedings of the Millennial Lecture Series on Religion & Science Interface 2002-2005, Beirut: Notre Dame University Press, pp. 67-86.
El-Hage, Y.K., (2003) Religious revelation and philosophical cognition: Two parallels that coalesce at the locus of truth. Proceedings of the Conference on Faith between culture, doctrine and power, 31 April,Beirut: Notre Dame University Press, pp. 89-94.
El-Hage, Y.K., (2001) L’Eglise et l’apostolat des droits de l’Homme (The Church and the apostolate of human rights) Proceedings of the International Conferenceon L’Eglise et le Social: Enseignement et Engagement, 24-26 May, The Holy Spirit University, Kaslik, Lebanon. Publications of the movement “Justice and Peace”, pp. 127-138.
El-Hage, Y.K., (2000) The cultural contribution of the Church in Lebanon: foundations in the past and perspectives for the future. Proceedings of the Conference on The memory of the Church and her future propositions on art, culture, and public issues, 24 January. Beirut: Notre Dame University Press, pp. 57-67.
El-Hage, Y., (1998) My father as I knew him. Proceedings of the Seminar on Kamal Youssef El-Hage: some of his facets… and beyond, 26 March. Beirut: Notre Dame University Press, pp. 116-172.
El-Hage, Y., Elffroth, B., Wagner, U., Wagner, F.E., Riederer, J., Echt, R., & Hachmann, R. (1991) Mössbauer and neutron activation analysis of ceramic finds from the Early Phoenician palace in Kamid El-Loz, Lebanon. In: E. Pernicka and G.A. Wagner (eds.), Archaeometry '90, Int. Symposium on Archaeometry, 2-6 Apri , Heidelberg, Birkhäuser Verlag, Basel-Boston-Berlin, pp. 375-384.
Internal Reports
El-Hage, Y.K. (2007) “Christian-Muslim conflicts and acts of violence in Lebanon” (Internal report submitted on October 11, 2007, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2007) “A glance at the state of Christian-Muslim relations in Lebanon” (Internal report submitted on October 11, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2006) “Some reflections on violence between Christians and Muslims with an eye on Christian-Muslim relations in Lebanon and the Middle East” (Internal report submitted on October 26, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2005) “A sketchy view of the state of Christian-Muslim relations in Lebanon with an emphasis on the implications of history on the present” (Internal report submitted on October 27, within the new quinquennium 2005-2010, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2003) “Relations islamo-chrétiennes au Liban” (Mai 2002-Mai 2003) (Internal report submitted on April 30, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2002) “Relations islamo-chrétiennes au Liban” (Mai 2001-Mai 2002) (Internal report submitted on May 1, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2001) “Relations islamo-chrétiennes au Liban” (Mai 2000-Mai 2001) (Internal report submitted on May 17, 2001, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (2000) “Bref aperçu sur la situation actuelle de l’Islam et des relations islamo-chrétiennes au Liban” (Internal report submitted on May 22, to the Pontifical Commission for Religious Relations with Muslims; The Holy See).
El-Hage, Y.K. (1987) “Principles of cluster analysis in ancient pottery classification; a vademecum.” (Internal report E15; Technische Universität München)
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