Marina Moreno

Marina Moreno is an LSE Fellow working at the intersection of decision theory, metaethics, and the philosophy of well-being. Her research aims to take the complexities of agency and welfare seriously while using formal tools to make precise claims about them. For instance, she explores how to make decisions in the face of deep value conflicts, how well-being should be aggregated across a lifetime, and how to capture the essentially relational elements of normative theorising that go beyond the individualistic paradigm. In doing so, she draws on formal tools from, e.g., decision theory, bargaining theory, social choice theory, and axiomatic population ethics.

Her current project focuses on the nature and significance of ill-being, including its applications to population ethics, artificial intelligence, and medical ethics. She is interested in how desire-based models of well-being can capture the distinct character of ill-being, whether such models can account for the intuition that sentience plays a vital role in suffering, whether the avoidance of suffering grounds a principle of decision-making in its own right, and whether suffering is tractable in non-human subjects such as artificial systems. Beyond this focus, she has research interests in social epistemology, political philosophy, and AI safety. She completed her PhD in 2026 at the Munich Center for Mathematical Philosophy at LMU Munich.

Research Interests

• Philosophy of well-being and ill-being
• Decision theory and rational choice theory
• Subjectivist metaethics
• Normative ethics
• Social epistemology
• Ethics and epistemology of artificial intelligence.