How Should We Then Live: The Rise and Decline of Western Thought and Culture is a Christian cultural and historical documentary film series and book. The book was written by presuppositionalist theologian Francis A. Schaeffer and first published in 1976. The book served as the basis for a series of ten films. Schaeffer narrated and appeared throughout the film series, which was produced by his son Frank Schaeffer and directed by John Gonser. In the film series, Schaeffer attacked the influences of the Renaissance, the Enlightenment, and Charles Darwin. The films were credited with inspiring a number of leaders of the American conservative evangelical movement, including Jerry Falwell. The complete list of materials that the Schaeffers produced under the title "How Should We Then Live?" include the initial book, a study guide for the book, the ten-episode film series, and study aids for the films.