As argued in Must Politics Be War?, it is feasible for some societies to avoid a warlike politics through the appropriate cultivation of social and political trust. This involves establishing societal rules that are mutually acceptable, that is, publicly justified, for each group. These rules prod diverse people to act in ways that signal their fundamental trustworthiness to one another, creating trust between different persons otherwise inclined to tribalism and conflict. These rules, however, must also create trust in the real world with real people, increasing trust for the right reasons. In this way, the aim of this book is to show that some liberal institutions create trust for the right reasons between diverse persons. It is, in this way, also a defense of a form of public reason liberalism.