University of MissouriMU School of Law

Faculty & Scholarship

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Margaret E. McGuinness

Margaret (Peggy) E. McGuinness
  • Public International law
  • International human rights and humanitarian law
  • International business transactions
  • International Organizations
  • Foreign Affairs and the Constitution
Associate Professor of Law

BA (1987), American University
JD, with distinction (1999), Stanford Law School

  • Phone Number: (573) 882-7293
  • Room Number: 319 Hulston Hall
  • E-Mail Address:
  • Blog: Opinio Juris
  • Curriculum Vitae (PDF)

Professor McGuinness joined the faculty in 2003 after practicing law in the litigation department of Paul, Weiss, Rifkind, Wharton & Garrison LLP in New York.

While at law school, Professor McGuinness was an articles editor for the Stanford Law Review and a graduate fellow at the Stanford Center on Conflict and Negotiation. Following law school, she clerked for Judge Colleen McMahon, of the U.S. Southern District of New York.

Prior to law school, Professor McGuinness was a Foreign Service Officer with the State Department. She was a Special Assistant to Secretary of State Warren Christopher from 1993-1994. Professor McGuinness teaches international law, international human rights, international business transactions, foreign affairs and the constitution, and federal courts. She has published in the area of mediation in armed conflict, the status of refugees in conflict zones, and the role of the UN in war.

Professor McGuinness is a co-founder of, and contributor to, Opinio Juris, a weblog dedicated to reports, commentary, and debate on current developments and scholarship in the fields of international law and politics.

Recent Publications

Book Chapters/Collected Works

Security Multilateralism: Progress and Paradox , in PROGRESS IN INTERNATIONAL ORGANIZATION, (eds. Rebecca Bratspies and Russell Miller, Martinus Nijhoff Publishers, 2008).
| SSRN | Catalog |

Weblogs

Opinio Juris with Chris Borgen, Julian Ku, Roger Alford, Kevin Jon Heller, and Duncan Hollis, at http://www.opiniojuris.org/
| Opinio Juris |

Academic Journals

Old W(h)ine, Old Bottles: A Reply to Professor Paulsen , 119 YALE LAW JOURNAL POCKET PART 31 (2009).
| SSRN | Westlaw | Keycite ® |

The President, Congress and the Security Council: Counterterrorism and the Use of Force Through the Internationalist Lens (Presidential Power in the 21st Century Symposium), 45 WILLAMETTE LAW REVIEW 417 (2009).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Medellin v. Texas. 128 S.Ct. 1346 (2008). United States Supreme Court, March 25, 2008, 102 AMERICAN JOURNAL OF INTERNATIONAL LAW 622 (2008).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Book Review: Secretary or General? The UN Secretary-General in World Politics, 102 AMERICAN JOURNAL OF INTERNATIONAL LAW 930 (2008).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Federalism and Horizontality in International Human Rights, 73 MISSOURI LAW REVIEW 1265 (2008).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Foreword - Return to Missouri v. Holland: Federalism and International Law (symposium), 73 MISSOURI LAW REVIEW 921 (2008).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Three Narratives of Medellin v. Texas, 31 SUFFOLK TRANSNATIONAL LAW REVIEW 227 (2008).
| Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Sanchez-Llamas, American Human Rights Exceptionalism and the VCCR Norm Portal , 11 LEWIS AND CLARK LAW REVIEW 47 (2007).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Contesting the 'Sovereigntists': How to Learn to Stop Worrying and Love International Institutions, 38 GEORGE WASHINGTON INTERNATIONAL LAW REVIEW 831 (2006).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Medellin, Norm Portals, and the Horizontal Integration of International Human Rights, 82 NOTRE DAME LAW REVIEW 755 (2006).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Women as the Architects of Peace: Gender and the Resolution of Armed Conflict, 15 MICHIGAN STATE UNIVERSITY COLLEGE OF LAW JOURNAL OF INTERNATIONAL LAW 63 (2007).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Exploring the Limits of International Human Rights Law, 34 GEORGIA JOURNAL OF INTERNATIONAL AND COMPARATIVE LAW 393 (2006).
| SSRN | Westlaw | Keycite ® | LexisNexis | Shepard's ® | HeinOnline |

Book Review: International Dispute Settlement in an Evolving Global Society: Constitutionalization, Accessibility, Privatization, Francisco Orrego Vicuna, (Cambridge 2005) 39 CANADIAN JOURNAL OF POLITICAL SCIENCE (2006).
| Cambridge Journals Online |

Additional Publications

The Politics of Progress in International Law: Progress and Paradox in the Regulation of the Use of Force, AMERICAN SOCIETY OF INTERNATIONAL LAW PROCEEDINGS (April 9-12, 2008).
| Westlaw | Keycite ® |

Medellin v. Texas: Supreme Court Holds ICJ Decisions Under the Consular Convention Not Binding Federal Law, Rejects Presidential Enforcement of ICJ Judgments Over State Proceedings , 12 No. 6 AMERICAN SOCIETY OF INTERNATIONAL LAW INSIGHTS (April 28, 2008).
| SSRN | online |

Case Concerning Armed Activities on the Territory of the Congo: The ICJ Finds Uganda Acted Unlawfully and Orders Reparations , AMERICAN SOCIETY OF INTERNATIONAL LAW INSIGHTS (January 9, 2006).
| SSRN | online |