One of the key scientific challenges is the puzzle of human cooperation. Why do people cooperate with one another? What causes individuals to lend a helping hand to a stranger, even if it comes at a major cost to their own well-being? Why do people severely punish those who violate social norms and undermine the collective interest? Edited by Paul A.M. Van Lange, Bettina Rockenbach, and Toshio Yamagishi, Trust in Social Dilemmas carefully considers the role of trust in establishing, promoting, and maintaining overall human cooperation. By exploring the impact of trust and effective cooperation on relationships, organizations, and communities, Trust in Social Dilemmas draws inspiration from the fact that social dilemmas, defined in terms of conflicts between self-interest and the collective interest, are omnipresent in today’s society. In capturing the breadth and relevance of trust to social dilemmas and human cooperation more generally, this book is structured in three effective parts for readers: the biology and development of trust; the importance of trust for groups and organizations; and how trust factors across the overall health of today’s society. As Van Lange, Rockenbach, Yamagishi, and their team of expert contributors all explore in this compelling new volume, there is little doubt that trust and cooperation are intimately related in most – if not all – of our social dilemmas.