Even though several branches of philosophy meet in the notion of trust, it has nevertheless been largely neglected by mainstream philosophy. Arguably, most existing analyses fail to give a just account of the reality of human experience. The author of this study believes that this is not a coincidence, but symptomatic of the irrelevance of received ideas of rationality for crucial areas of human agency. Individualist approaches, he argues, can be accused precisely of ignoring fundamental questions about the nature of the individual. Expanding on the works of Wittgenstein, Winch, and others, the author demonstrates the conceptual significance of our dependence on others. The discussion stretches over philosophical psychology, epistemology, political philosophy and moral philosophy. The book may be of interest to those interested in philosophy, psychology or the social sciences.