The Tanner Lectures on Human Values is the annual publication of the Tanner lectures given at Clare Hall, Cambridge University; Brasenose College, Oxford University; Harvard University; Yale University, the University of California; Stanford University, the University of Michigan; and the University of Utah and other locations. Established to reflect upon the scholarly and scientific learning relating to human values, the lectureships are international and intercultural, and transcend ethnic, national, religious, and ideological distinctions. Appointment as a Tanner lecturer is a recognition of uncommon capabilities and outstanding scholarly or leadership achievement in the field of human values. The lecturers in Volume IV, originally published in 1983, examine modern society from a number of philosophical and practical points of view, and all are optimistic concerning the possibility of our continued growth and survival.