Francis Schaeffer is a is a theologian formed in Westiminter Seminary (Manchester). He was part of traditional Presbyterian Church, however his thoughts were much more philosophic than theologic. Second the journal Christians Today, that keep a long term history from his life, his wife Edith influenced him to move to Switzerland. There they started their own ministry called L'Abri (home in french) to receive students to learn theology, history and philosophy. And this point, Francis start to realize his true ministry to show to the Christian worldwide churches the worldview and its consequences.
Thee book's title is a revelation in Schaeffer's life reveled from God in the book of Prophet Ezekiel, chapel 33, verses