Many of the people we regard as moral exemplars have profound faith in people’s decency: When segregationists bombed a black church in Birmingham, Alabama, killing four little girls, Martin Luther King, Jr. insisted that “somehow we must believe that the most misguided among them can learn to respect the dignity and worth of all human personality”. Returning to his work in psycho-therapy after spending two and a half years in Nazi concentration camps, Viktor Frankl adopted as a guiding principle the view that “if we treat people as if they were what they ought to be, we help them become what they are capable of becoming”. During his campaign to secure civil rights for Indians living in South Africa, and later to secure independence for India, Gandhi urged his followers to treat as “an article of faith” the view that there is “no one so fallen” that he cannot be “converted by love”. That these and other moral exemplars have such faith is no accident. As I will argue, having a certain form of faith in people’s decency, which I call faith in humanity, is a centrally important moral virtue.