==Philosophy==
*{{main|Puritan}}*{{main|Radical}}The Inquisition can be broadly divided into two differing schools of thought: '''Puritanism[[Puritan]]ism''' and '''Radicalism[[Radical]]ism'''.
To the conservative Puritans, it is of the utmost importance that Inquisition doctrine be upheld, and are often found persecuting those Inquisitors who are deemed heretical.
Inquisitors of both sides are found in great number, and while often at odds with each other, are equally interested in the survival of mankind and the defeat of its enemies. Puritans and Radicals are further divided into individual philosophies, leading to further friction:
===Puritans===
*'''[[Amalathian]]ism''' - The conservative philosophy of Puritanism. It advocates unity between Imperial organisations and lack of tumultuous change. It was at the birth of this philosophy, on Gathalamor, at Mount Amalath, that [[Macharius (Character)|Lord Commander Solar Macharius]] was spurred on to his grand conquest of nearly a thousand worlds.
*'''[[Monodominant|Monodominance]]''' - This philosophy holds that man can only survive in the Galaxy at the death of every other creature, be it alien, [[mutant]], or even [[psyker]] (which would potentially harm the [[Imperium]], seeing as all galactic communication and long-distance travel is psychic in nature). They are arguably the most extreme of the Puritans.
*'''[[Thorians|Thorianism]]''' - These members of the Inquisition believe that the Emperor will some day be reincarnated. This is the most 'radical' of the Puritan ideologies due to the possible upheaval that could result should the Thorians actually be able to summon the Emperor into a new form, as Believers and Unbelievers would turn upon each other. Named after [[Sebastian Thor]], thought to be an avatar of the Emperor.
''Minor Puritan Factions''
*'''Anomolian Beholders''' - A conservative faction who see it as their job to observe humanity and await the arrival of the Emperor Incarnate.<sup>6</sup>
*'''Ardentities''' - The Ardentities believe that the Emperor Incarnate will manifest through a group of people, or more likely the entirety of Mankind.<sup>6</sup>
===Radicals===
*'''Istvaanism''' - To this ideology, conflict is desirable to further progress through strife. It holds that mankind has made its greatest achievements after periods of conflict, such as the [[Horus Heresy]], or [[Age of Apostasy]]. It is the place of the Istvaanians to strengthen mankind through adversity, and so follow a 'survival of the fittest' doctrine. The philosophy is named after the [[Isstvan III]] [[Virus bombs|virus-bombings]] that initiated the Horus Heresy.
*'''Recongregationism''' - According to this philosophy the Imperium, after millennia, has become decadent and corrupt. To remedy this, Recongregators consider that the Imperium should be rebuilt, lest it stagnate further and collapse under the pressure of countless threats from both without and within.
*'''Xanthism''' - The most obviously Radical grouping within the Inquisition, it advocates the use of Warp-based weaponry, such as daemon possessed swords, daemonhosts, and generally turning the power of [[Chaos]] against itself. Named after Inquisitor-Master '''Zaranchek Xanthus''', executed as a heretic in the 32nd millennium.
''Minor Radical Factions''
*'''Antiquarti''' - A group that split from the Ocularians lead by Inquisitor [[Thaddeus Hakk]], they focus on discovering patterns and events in the past to predict the future.<sup>15</sup>
*'''Casophilians''' - Following the writings of [[Saint Casophili]], the Casophilians dedicate their study to the transition of a human soul to the Warp. They seek to devise a way to bring forth the soul of a deceased man or woman in order to create the means by which the Emperor's soul can be invested into a suitable mortal form.<sup>6</sup>
*'''Horusians''' - A resurrectionist faction like the Thorians, but of a much more radical bent. They believe that the powers of Chaos that manifested themselves in Horus might be harnessed for the creation of a Divine Avatar.<sup>6</sup>
*'''Libricars'''- A faction founded in the [[Calaxian]] system, which adheres to an extension of Amalathian belief. The Libricars believe in the widespread purging of all Imperial institutions of all corruption and heresy, including the Inquisition, no matter how minor.<sup>14</sup>
*'''Oblationists''' - Oblationists believe that the Warp, the xenos and the unclean are utterly damning and those who utilise them must face the ultimate sanction. Yet they also believe their use is necessary to overcome mankind's enemies. Therefore the righteous must sacrifice themselves and embrace damnation in order for humanity to survive.<sup>8</sup>
*'''Ocularians'''- A faction devoted to predicting and divining the future.<sup>14</sup>
*'''Phaenonites''' – A Xanthite splinter faction particularly interested in the merging of the Warp and technology. They have turned their back on the Emperor and believe in the rebirth of the Imperium under their own leadership, and as such are one of the only Inquisitorial Factions to be declared wholesale Excommunicate Traitoris.<sup>14</sup>
*'''Polypsykana''' - An offshoot of the Xanthites, they believe that humanity is destined to evolve into a fully psychic race, and seek to hasten and support the occurrence of psykers throughout the Imperium.<sup>8</sup>
*'''Revivificators''' - The Revivicators study the transition of the soul to the Warp at the point of death. In particular, they study the means by which this can be slowed, halted and, ultimately, returned. They also study the [[Golden Throne]] hoping to alter its working so that the Emperor's body might be restored. To this end, they study the processes by which a corpse may be maintained in a state ready for such a reinfusion of the soul.<sup>6</sup>
*'''Seculos Attendous''' - A faction that sees the Ecclesiarchy as hampering and holding back mankind, and look to reduce its power and influence where possible.<sup>8</sup>
*'''Xeno Hybris''' - Xeno Hybris followers believe that there is much to be learned from alien technology, and only through co-operation with Xenos species will humanity ever prevail.<sup>8</sup>
==History==
