This article concerns the phenomenon of trust—in others who are familiar and in humanity in general. I make a case that the foundations of both forms of trust are rooted in formative experiences. Trust springs from the sense of security we develop in early nurturing relationships. In friendships and peer relationships we learn about loyalty, accountability, and the reciprocity between trust and trustworthiness. However, trust among friends is an insufficient basis for social trust. To nurture a faith in humanity, children need to interact and cooperate with people who are different from them and values of equality, tolerance, and empathy have to be high priorities in theirfamilies.