Meron was born in Kalisz, Poland, to a Jewish family. Meron was held in a Nazi labor camp during World War II. In 1945, he immigrated to Mandatory Palestine. He received his legal education at the Hebrew University (M.J.), Harvard Law School (LL.M., J.S.D.) and Cambridge University (Diploma in Public International Law). He immigrated to the United States in 1978 and is a citizen of the United States and the United Kingdom.^{[4][citation needed]}

Meron is a scholar of public international law, international humanitarian law, human rights and international criminal law. Prior to his immigration to the United States, Meron was a legal adviser of the Israeli Ministry of Foreign Affairs.^[4] Starting in 1977, he has served as a Professor of International Law at the Geneva Graduate Institute of International Studies, a visiting professor at Harvard Law School and UC Berkeley, and a Professor of International Law at New York University School of Law, where he was named the Charles L. Denison Chair at New York University School of Law in 1994. In 2000-01 he served as Counselor on International Law in the U.S. Department of State. In 2006 he was named Charles L. Denison Professor Emeritus and Judicial Fellow at New York University School of Law.^[4] He has been a visiting professor at Oxford University since 2014, a visiting fellow at Mansfield College, and an academic associate at the Bonavero Human Rights Institute. In May 2019, he was elected Honorary Visiting Fellow of Trinity College, Oxford, and later an Honorary Fellow.

In 1990, Meron served as a “Public Member” of the United States Delegation to the CSCE Conference on Human Dimensions in Copenhagen. In 1998, he served as a member of U.S. Delegation to the Rome Conference on the establishment of an International Criminal Court. He served on several committees of experts of the ICRC, on Internal Strife, on Environment and Armed Conflicts, and on Customary Rules of International Humanitarian Law. He co-leads the annual ICRC-NYU seminars on international humanitarian law for UN diplomats.^[4] In 2022 he was appointed Special Advisor on International Humanitarian Law to the Prosecutor of the International Criminal Court.

Meron is a member of the Institute of International Law and the Council on Foreign Relations and is a former Honorary President of the American Society of International Law. He has also served as Co-Editor-in-Chief of the American Journal of International Law. He was awarded the 2005 Rule of Law Award by the International Bar Association and the 2006 Manley O. Hudson Medal of the American Society of International Law.^[4]

He was made an Officer of the Legion of Honor by the President of the French Republic in 2007.^[5] He received the Charles Homer Haskins Prize of the American Council of Learned Societies for 2008. In 2009, Meron was elected to the American Academy of Arts and Sciences. He was awarded a LLD honoris causa by the University of Warsaw in 2011 and LLD honoris causa by the University of Calisia, (Kalisz)in 2021, and in 2017 he was made Officer of the Order of Merit of Poland. He was also named "Grand Officier" of the National Order of Merit by the President of France in 2014.^[4] For service to criminal justice and international Humanitarian Law, Queen Elizabeth II made him an Honorary Companion of "the Most Distinguished Order of St. Michael and St. George" (CMG) in 2019.^[6] That same year, he was also one of 17 honorees selected by One Young World and Vanity Fair for the inaugural Global Achievements List, cited for his contributions "for peace, justice and strong institutions" (UK March 2019 issue).^[7]

Legal opinion on settlements in the occupied territories edit

In the late 1960s, Meron was legal counsel to the Israeli Foreign Ministry and wrote a secret 1967 memo^[8][9][10] for Prime Minister Levi Eshkol, who was considering creating an Israeli settlement at Kfar Etzion. This was just after Israel's victory in the Six-Day War of June 1967. Meron's memo concluded that creating new settlements in the Occupied Territories would be a violation of the Fourth Geneva Convention. Eshkol created the settlements anyway. Fifty years later, in 2017, Meron, citing decades of legal scholarship on the subject, reiterated his legal opinion regarding the illegality of Israeli settlements in the Occupied Territories.^[11]

ICTY edit

In June 2013, Judge Frederik Harhoff of Denmark, a judge at the ICTY, circulated a letter saying that Meron had pressured other judges into acquitting Serb and Croat commanders. The letter claimed Meron had raised the degree of responsibility that senior military leaders should bear for war crimes committed by their subordinates, to the point where it a conviction has become nearly impossible. It blamed Meron, whom it identified as an American, for the acquittals of top Serb and Croat commanders.^[12]

In August 2013, a chamber appointed by the ICTY Vice-President found by majority that Judge Harhoff had demonstrated an unacceptable appearance of bias in favour of conviction. Harhoff was therefore disqualified from the case of Vojislav Šešelj. The decision followed a defence motion seeking the disqualification of Harhoff on the basis of Judge Harhoff's letter.^[13] Following the decision on his disqualification for bias, Harhoff, who was an ad litem judge, had to leave the ICTY.

In the Judgment of the International Court of Justice of 3 February 2015, the Court, which is the principal judicial organ of the United Nations, expressed agreement with the ICTY majority judgement in the case of Ante Gotovina and Mladen Markač, which was at the center of Harhoff's criticism of Meron, who presided over the Gotovina and Markač appeal.^[14]

Meron has given numerous public lectures, a TEDx talk and public interviews.

In 2019, Meron was appointed Honorary Companion of the Order of St Michael and St George (CMG), for services to criminal justice and international humanitarian law.^[15] On 1 April 2022 the appointment was made substantive.^[16]

Meron's books include:

• Investment Insurance in International Law (Oceana-Sijthoff, 1976)
• The United Nations Secretariat (Lexington Books, 1977)
• Human Rights in International Law (Oxford University Press, 1984)
• Human Rights Law-Making in the United Nations (Oxford University Press, 1986; awarded the certificate of merit of the American Society of International Law)
• Human Rights in Internal Strife: Their International Protection (Sir Hersch Lauterpacht Memorial Lectures, Grotius Publications, 1987)
• Human Rights and Humanitarian Norms as Customary Law (Oxford University Press, 1989)
• Henry's Wars and Shakespeare's Laws (Oxford University Press, 1993)
• Bloody Constraint: War and Chivalry in Shakespeare (Oxford University Press, 1998)
• War Crimes Law Comes of Age: Essays (Oxford University Press, 1998)
• International Law In the Age of Human Rights (Martinus Nijhoff, 2004)
• The Humanization of International Law (Hague Academy of International Law and Nijhoff, 2006);^[17]
• The Making of International Justice: A View from the Bench, appeared in 2011 (Oxford University Press).
• Standing Up for Justice: The Challenges of Trying Atrocity Crimes (Oxford University Press, 2021)

Meron is among the editors of Humanizing the Laws of War: Selected Writings of Richard Baxter (Oxford University Press 2013). He has also published well over 100 articles in various legal periodicals.

Reflections on the Prosecution of War Crimes by International Tribunals: A Historical Perspective in the Lecture Series of the United Nations Audiovisual Library of International Law

• Official web page at New York University
• A Life of Legal Principle, Not of Politics – An Interview with Theodor Meron, July 2016