People

Team 

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Benjamin Kiesewetter (PI)

I am Professor of Practical Philosophy at Bielefeld University. As Principal Investigator of this project, I participate in all four subprojects, but my current focus is on deontically normative notions (subproject 2). Besides my interest in the theory of normativity, I also work on questions in political philosophy, ethical theory and applied ethics. I obtained my doctorate from Humboldt University Berlin (2014). Before coming to Bielefeld, I held positions and scholarships at HU Berlin, UC Berkeley, Di Tella University Buenos Aires, ANU Canberra, University of Hamburg, TU Dresden and FU Berlin. You can read more about my work on my personal website.

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Sophia Arbeiter (Postdoctoral Researcher)

I joined the project as a postdoctoral researcher in September 2025. I am interested in various forms of irrationality (i.e. the assertion of a Moore-paradoxical sentence, akratic action or acratic belief, the possibility of beliefs that violate the logical laws), with a focus on the significance of the first-person perspective. I am currently working on the forms of irrationality that may emerge for our reason-sensitive attitudes, such as beliefs. I am investigating the notion of reason at issue in the core concepts of epistemology (subproject 3). I am also interested in the sense in which reason-sensitive attitudes and reason-insensitive attitudes may be considered fitting (subproject 4). I received my PhD in Philosophy from the University of Pittsburgh. You can read more about my work on my personal website.

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Leo Eisenbach

I am a visiting doctoral student in the project and a PhD student at Humboldt University Berlin. My research interests are in the theory of normativity, ethics, and epistemology. In my dissertation, I focus on analyzing praiseworthiness and blameworthiness across different normative domains, especially the moral, the epistemic, and the aesthetic one. My dissertation thus touches upon all four subprojects.

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Shane Ward (Postdoctoral Researcher)

I am currently a postdoctoral researcher on the project. My general research interests are in ethics, metaethics, and epistemology. I have broad interests in all four subprojects, but my current research focuses on the relationship between reasons and deontic concepts (subproject 2) and on whether normative reasons can be analyzed in terms of explanatory reasons. I received my PhD from the University of Southern California.

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Eliot Watkins (Postdoctoral Researcher)

I started work as a postdoctoral researcher on the project in April 2025. I am interested in a wide variety of questions in ethics and metaethics, but right now I’m focused on how we should weigh up Reasons-First and Fittingness-First approaches to normativity (subproject 4). I’m also doing work on the relationship between facts about oughts and facts about reasons (subproject 2), and how we can make sense of reasons for/against particular degrees of belief, or levels of confidence (subproject 3). I received my PhD in Philosophy from MIT. You can learn more about me on my personal website.

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Marie Wegener (Doctoral Researcher)

I am a doctoral researcher of the project. My philosophical interests are metaethics, philosophy of emotions, philosophy of language, applied ethics and Wittgenstein. While I am interested in all four subprojects, my current research focuses on the relation between practical reasons and value (subproject 1), and explores whether there might be a plausible unified indirect-value-based theory of practical reason. I studied at Bielefeld University and Uppsala University.

Affiliated Members

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Dmitry Ananiev

I am a postdoctoral researcher in practical philosophy at Bielefeld University. My research interests are in normative ethics, metaethics, and political philosophy. My current work focuses on imperfect moral rights, the nature of obligatory ends, and the epistemic condition on moral responsibility. Prior to joining Bielefeld University, I defended my PhD dissertation at the London School of Economics (LSE). You can find more information about my work on my personal website.

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Lucas Andrade

I am a PhD student in Philosophy at the Federal University of Minas Gerais, Brazil, and a Research Student at Kyoto University, Japan (MEXT Scholar). I was a visiting doctoral student in the “Structure of Normativity” project from August 2024 to February 2025, supported by the CAPES–PDSE Program. My current research in metanormativity and practical reasoning focuses on reason-based accounts of normative concepts, with special attention to second-order reasons and their role in explaining the central normative concept of ‘ought’. My broader philosophical interests include legal philosophy, the philosophy of agency, and the ethics of artificial intelligence and robotics.

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Alexander (Sasha) Arridge

I am a DPhil student at St Anne’s College, Oxford and a Lecturer in Philosophy at Magdalen College, Oxford. I was visiting doctoral student of the “Structure of Normativity” project from September 2023 to March 2024. My primary research interests lie at the intersection of practical rationality and the metaphysics of value and reasons. Outside of meta-ethics I have various interests in normative and practical ethics, including in environmental ethics and Aristotle’s ethics. I am also a research assistant for the ERC project “Protecting Minds: The Right to Mental Integrity and The Ethics of Arational Influence”.

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Singa Behrens

I am a professor for ethics at Goethe University Frankfurt. My research focuses on normativity and foundational questions in moral philosophy and metaethics. I have also worked on issues in metaphysics and truthmaker semantics. Before coming to Frankfurt, I was a post-doctoral research assistant and lecturer at Bielefeld University. I obtained my PhD from the University of Hamburg in 2023 with a dissertation on logical and metaphysical interpretations of the is-ought gap. You can read more about my work on my personal website.

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Daniele Bruno

I am a post-doctoral researcher at Humboldt University Berlin and affiliated member of the group. From April to September 2024, I was visiting professor at Universität Bielefeld and guest member of the team, replacing Benjamin Kiesewetter during a research leave. My research interests lie at the intersection of normative ethics and metaethics, connecting primarily with subprojects 1 and 2. I obtained my PhD from Humboldt University in 2021 with a dissertation on promissory normativity. My current research project, funded by DFG, investigates the ways in which our epistemic limitations affect both what we are required to do and what we can be held responsible for. You can read more about my work on my personal website

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Eline Gerritsen

I am a postdoctoral researcher in metaethics with a primary interest in the nature of normativity. My PhD thesis, written at the universities of St Andrews, Stirling and Groningen, deals with authoritative normativity and moral error theory. My current main focus, starting with an independent research project at the University of Hamburg, is on the normative status of social norms. In this context, I connect questions about the structure of normativity with discussions in social ontology, philosophy of law, and moral theory. You can find more about my work on my personal website.

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Marius Meyer zu Knolle (Doctoral Researcher)

I am a doctoral researcher affiliated with the project. My dissertation investigates the intersection of traditional decision theory and recent philosophical work on normative reasons. It addresses challenges that arise when integrating probabilistic models of rational choice with reasons-responsiveness theories, especially under conditions of empirical and evaluative uncertainty. My research spans themes of subproject 2—by examining the epistemic availability of reasons as a core concept in analyzing 'ought' in terms of reasons—and subproject 3—by exploring how rational credences can be understood as responses to epistemic reasons. Before I started the dissertation, I received a scholarship from ERC funds to prepare the project.

Cooperation partners

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ERC Grant “The Structure of Normativity”

Prof. Dr. Benjamin Kiesewetter
Chair of Practical Philosophy
Department of Philosophy

Bielefeld University
P/O 100131, 33501 Bielefeld
Email: normativity(at)uni-bielefeld(dot)de

Design & Development: Studio Nina Reisinger

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