Dissertation Prize

Oxford Nicolas Berggruen Prize in PLP

The Oxford Nicolas Berggruen Prize for Best Doctoral Dissertation in Philosophy, Law & Politics, generously funded by Nicolas Berggruen of the Berggruen Institute in Los Angeles, recognises a doctoral dissertation that is both excellent and transformative, in theory or in practice.

Each year, one outstanding dissertation is nominated by each of the three participating Oxford faculties: Philosophy, Law, and the Department of Politics and International Relations (DPIR). The final selection is made by a dedicated committee in accordance with the terms of the prize.

2026 Prizewinner
Dr Natasha Holcroft-Emmess

Dr Natasha Holcroft-Emmess

University of Oxford (DPhil in Law); now Lecturer in Law, Exeter College, Oxford

Human Rights in Conflicts and Crises: Derogation under Human Rights Treaties

Thesis summary

The thesis investigates the conditions under which States can lawfully take measures in times of war or emergency that would, in normal circumstances, violate human rights. Since the Second World War, States have created international treaties under which they assume obligations to protect human rights. Certain of those obligations can be suspended in times of war or qualifying emergency, subject to the conditions in the treaties’ derogation clauses. How courts and other actors, including government legal advisers, understand the conditions for valid derogation determines the scope of rights protection in times of conflict and crisis.

Among its claims, the thesis reasserts the importance of distinguishing limitations of human rights from derogation measures (i.e. suspensions of human rights), in light of case law that arguably makes that distinction more difficult to draw. Holding that conceptual line is important if human rights protection is not to be watered down. The thesis also reveals unclarity in the law about whether the duty to notify derogation measures conditions States’ ability to rely on the derogation clause as a defence to alleged human rights violations. The thesis argues that failure adequately to notify derogation measures should preclude a valid derogation. This understanding would position the derogation clause as an important tool for transparency and accountability when States take measures exceptionally restrictive of rights.

Overall, the thesis is a call to rediscover and practically implement the safeguards for human rights envisioned by the drafters of the human rights treaties, to whom the grave consequences of emergency and wartime measures were all too clear. It aims to contribute to the achievement of the ambitious liberal project of the post-war period: the effective protection of human rights through international law.

Examiners’ assessment

The examiners described the dissertation as “an outstanding contribution to legal scholarship” in the field of human rights derogations, and encouraged Dr Holcroft-Emmess to develop the thesis for publication as a book.

In the recipient’s own words
I am delighted and so very grateful that my thesis has been awarded the Oxford Nicolas Berggruen Prize. I would like to thank everyone who has supported my research in Oxford and beyond. My doctoral thesis critically analyses the conditions under which States may lawfully suspend (i.e. derogate from) certain obligations assumed under international human rights treaties. The thesis argues that derogation clauses can, if carefully construed, function as mechanisms for transparency and accountability over measures exceptionally restrictive of rights. The thesis aims to foster the effective protection of human rights, even in the challenging circumstances of conflict and crisis.
About the recipient

Dr Natasha Holcroft-Emmess specialises in international human rights law, with a particular focus on the legal regulation of rights during conflicts, emergencies and crises. She studied for the BA in Jurisprudence, the Bachelor of Civil Law, the MPhil in Law and the DPhil in Law at the University of Oxford, completing her doctorate in 2025.

Past recipients

Dr Simeon Goldstraw
2025

Dr Simeon Goldstraw

University of Oxford (DPIR, DPhil in Politics); now working in Parliament
Establishing a Political Claim to Leisure
I am delighted and humbled to receive this year’s Oxford Nicolas Berggruen Prize. My thesis focuses on citizens’ entitlements to leisure. When we think of the most politically pressing questions of our day, people rarely think of leisure. Why should we worry about whether people enjoy arts, sports, or beaches when we face huge political challenges surrounding democracy, inequality, and technology? But leisure is a crucial part of a happy and flourishing life and, as my thesis shows, is politically important for all sorts of reasons. Its upshot is that we ought to treat a lack of access to leisure, or unequal access to leisure between people, as a political problem that requires political attention. Governments have a responsibility to ensure that people have adequate leisure opportunities, and this responsibility should not fall by the wayside.
Dr Lea Cantor
2024

Dr Lea Cantor

University of Oxford (DPhil in Philosophy); now Research Fellow at Peterhouse, University of Cambridge
Ancient Philosophy within a Global Purview: Parmenides and Zhuangzi on Expressing what Can (and Cannot) be Known
I am honoured, and delighted, that my doctoral dissertation has been selected for this year’s Oxford Nicolas Berggruen Prize. My doctoral work sought to reconceptualize ancient philosophy, by dispelling misconceptions about the early history of philosophy which persist to this day. My dissertation focuses on two foundational texts in the global history of philosophy: the classical Daoist text Zhuangzi, and the fragments of the Presocratic philosopher Parmenides. It challenges the deep-seated but facile typecasting of Zhuangzi as either an anti-rational relativist or a mystical monist, and of Parmenides as a triumphalist dogmatist. Currently I am working on a monograph based on my doctoral work. My research seeks to foster cross-cultural dialogue on ancient philosophy, and a globally minded approach to philosophy and its history. Going forward I intend to continue pursuing these aims.
Dr Katie Johnston
2023

Dr Katie Johnston

University of Oxford (DPhil in Law); now Lecturer in Law, University of Liverpool
The impact of the coexistence of multiple norms from different sources of international law on change to the jus ad bellum
I am honoured to be awarded the Oxford Nicolas Berggruen Prize and grateful to everyone at Oxford and beyond who supported me throughout my DPhil research. It is important that when states claim to be using military force against other states in accordance with international law these legal claims are subject to rigorous scrutiny — particularly where they are based on novel or controversial analyses of the law. I hope that my thesis has contributed to clarifying the complex international legal framework that regulates the use of force by states, so that such claims of lawfulness can be properly evaluated.
Dr Jay Ruckelshaus
2022 Inaugural

Dr Jay Ruckelshaus

University of Oxford (DPIR, DPhil in Politics); now Co-Founder & Head of Partnerships & Policy at Gravity
Partisanship, Polarization, and Political Identity
I’m incredibly humbled and honored to have been awarded the Nicolas Berggruen prize! The central focus of my work has been the power of ideas in democratic societies, so I feel particularly lucky to be acknowledged by a benefactor and an Institute driving transformative intellectual change. I hope to do my part in developing and – crucially – enacting ideas that help make the world more humane.