Fall 2025: Philosophy of Cosmology
This seminar is co-taught by Charlotte Zito and Christian Wüthrich.
The philosophy of physics deals with methodological, epistemological, and metaphysical issues in physics. This seminar has the dual purpose of systematically introducing the background necessary to do research in philosophy of physics as well as discussing current research in the field.
This seminar focuses on the philosophy of cosmology, which seeks to understand the conceptual foundations and methodological challenges involved in explaining features of the universe. Cosmology is often cashed out as the study of the largest-scale structure of the universe, as described by general relativity. From galaxies to black holes, cosmology strives to explain how these structures behave, how they have formed, and more broadly, to uncover the fundamental principles that govern the cosmos.
To fully address these aims, cosmology must also confront quantum physics. As we approach the big bang, the laws of relativity break down and quantum effects become more and more dominant. At even earlier times, a theory of quantum gravity becomes essential to explain the origin of the universe.
The philosophy of cosmology examines the conceptual and epistemological issues that arise in this context. This seminar will explore questions such as: How are cosmological theories developed and justified? What does it mean to test a theory that describes the entire universe? What role do fine-tuning arguments play in evaluating cosmological models? How do we assess explanations that involve unobservable or speculative elements, such as inflationary theory or the multiverse?
While some background in physics, mathematics, and philosophy will be helpful, all necessary concepts will be introduced throughout the course. No specific knowledge beyond high school mathematics will be assumed. This seminar will be conducted entirely in English, though papers may be submitted in French if desired.