A Canticle for Leibowitz opens 600 years after 20th century civilization has been destroyed by a global nuclear war, known as the "Flame Deluge." As a result of the war, there was a violent backlash against the culture of advanced knowledge and technology that had led to the development of nuclear weapons. During this backlash, called the "Simplification," anyone of learning, and eventually anyone who could even read, was likely to be killed by rampaging...