This selection of source readings brings together diverse materials from the Christian tradition in order to help students think theologically about the implications of religious plurality. Beginning with the Bible, the volume goes on to present primary texts from the history of Christian thought, ranging from Justin Martyr in the second century to John Paul II in the late twentieth century. Whilst showing students that the issue of religious pluralism is not new, the selection accentuates discussions in the twentieth century in which this has become a pressing area of theological inquiry. The volume fosters a comparative approach by including the works of major Catholic and Protestant thinkers.