[Dutch] The division of science into Natural Sciences, Social Sciences and Humanities may seem matter-of-course, but is in fact a fairly recent and by no means undebated one. This book describes how these different visions on science came to be and what ideals of knowledge and styles of argumentation they suppose. It also discusses the nature, structure and development of the Humanities. It delves into the history of these fields and the varying notions on their cultural place and function. The book displays a broad scale of twentieth century philosophical and methodological movements and therefore offers not only students of the Humanities a great insight into the background of their field, but also shows students of Social or Natural Sciences a wider vision on the historical and philosophical aspects of the Sciences.