Professor, sociologist, and theologian, Peter L. Berger (1929–2017) was the author of several influential books, including The Social Construction of Reality: A Treatise in the Sociology of Knowledge with Thomas Luckmann (1966); Invitation to Sociology: A Humanistic Perspective (1963); A Rumor of Angels: Modern Society and the Rediscovery of the Supernatural (1969); and The Sacred Canopy: Elements of a Social Theory of Religion (1967).