This document discusses apologetics, which it defines as explaining, clarifying, validating, and defending Christian truths and experiences while countering heresies and misunderstandings. It provides examples of apologetics in the New Testament and among early Church fathers. The document then traces the history of apologetics from the New Testament era through developments in the Reformation, Enlightenment, modern, and postmodern eras, noting how apologetics addressed various theological issues and challenges posed by science and new technologies.