This collection of original essays offers a comprehensive examination of scientific progress, which has been a central topic in recent debates in philosophy of science. Traditionally, debates concerning scientific progress have focused on different methodological approaches, notably the epistemic and semantic approaches. The chapters in Part I of the book defend these two traditional approaches, as well as the newly revived functional and newly developed understanding-based approaches. Part II features in-depth case studies of scientific progress from the history of science. The chapters cover individual sciences including physics, chemistry, evolutionary biology, seismology, psychology, sociology, economics, and medicine. Finally, Part ...