Introduction: In the mid-1970s, at Denver Baptist Bible College, I preached a chapel sermon from the Book of Jude. In preparation for that sermon, I discovered ten marks or characteristics of a true Fundamentalist. Recently I gave a series of lectures at Faith Baptist Theological Seminary on the subject of “The Biblical Basis of Separation.” I reviewed my notes from that earlier study in the Book of Jude, restudied the text itself along with the commentaries and expanded the details for each of the ten marks.