
It can also be seen that each author chooses and classifies demons differently based on the author’s personal set of beliefs or politics. It can be noted that according to each author listed below, the domain of each demon is varied greatly on either preference or perspective. This idea holds a similar connotation to the gods of classical mythology as each have their own tasks and abilities according to their authority and each interact with mankind in their own unique way. In general, the domain of a demon is reflected on whatever authority they hold in their interaction with mankind. They may even be attributed to the methods they cause trouble to humans by the use of certain misfortunes, maladies, or addictions. Oftentimes this means a specific moral sin or questionable behavior to which some people are prone. In the study of demonology, infernal spirits are often classified by domain, meaning their attribution to a specified sphere of activity or knowledge. Most authors who wrote theological dissertations on the subject either truly believed in the existence of infernal spirits, or wrote as a philosophical guide to understanding an ancient perspective of behavior and morality in folklore and religious themes. The classifications of these fallen angels are based on many other characteristics as well, such as behaviors that caused their fall from heaven, physical appearances or the methods that were used to torment people, cause maladies, or elicit dreams, emotions, etc. The study of demonology was historically used to understand morality, behavioral tendencies, and has even been used as symbolism to relay anecdotal tales in with which they lure people into temptation and may also include the angels or saints that were believed to have been their adversaries an idea which derived from the Biblical battle between the Archangel Michael and the Antichrist in The Book of Revelation (12:7-9) describing a war in heaven which resulted in Satan and his angels being expelled from Heaven.

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Theologians have written dissertations in Christian demonology, classical occultism, classical mythology and Renaissance magic to clarify the connections between these spirits and their influence in various cultures.

There have been various attempts throughout history by theologian scholars in the classification of Christian demons for the purpose of understanding the biblical and mythological context of adversarial spirits.
