Philosophic studies at the University of Dallas have three features that set the UD philosophy program apart from many others. First, UD philosophy students read the great philosophers themselves, not textbook summaries. The core courses and the historical courses, in particular, focus on the study of some of the most influential texts of the Western philosophical tradition. The History and Philosophy of Science (HPS) Concentration promotes reflection on a group of related but distinct intellectual disciplines: the natural sciences, the human sciences, and mathematics. Within this multidisciplinary reflection, the central perspectives provided by history and philosophy are complemented by approaches from theology and from the human and social sciences. In addition, the Concentration integrates the perspectives of scientists themselves with those of historians, philosophers, and others who study the sciences from without.