This new interdisciplinary textbook by Martin Hollis offers an exceptionally clear and concise introduction to the philosophy of social science. It unearths central philosophical problems underlying the standard ways of thinking about social institutions and social actions, leading the reader to reflect upon the nature of scientific method itself. Is the aim to explain the social world after the manner of the natural world, or to understand it from within? Writing in his characteristically clear and incisive prose, Martin Hollis reveals the crucial role to be played by philosophy in the study of the social sciences.