Book excerpt: The variety of approaches to the concept of trust in philosophy reflects the fact that our worries are diverse, from the Hobbesian concern for the possibility of rational cooperation to Wittgenstein's treatment of the place of trust in knowledge. To speak of trust is not only to describe human action but also to take a perspective on it and to engage with it. Olli Lagerspetz breathes new life into the philosophical debate by showing how questions about trust are at the centre of any in-depth analyses of the nature of human agency and human rationality and that these issues, in turn, lie at the heart of philosophical ethics. Ideal for those grappling with these issues for the first time, Trust, Ethics and Human Reason provides a thorough and impassioned assessment of the concept of trust in moral philosophy.