In these confusing times, it is important to understand the differences in doctrine and position that exist in the contemporary religious scene. These differences really do matter. What is the difference between Evangelicalism and Fundamentalism? What is the difference between apostasy and heresy. Do associations matter? This volume traces the various nuances of belief and disbelief beginning at Atheism and ending with subject of heresy. This treatment is not exhaustive but strives to cover the Isms and Schisms that influence our times.