Chaos Cults are the most dangerous of all those organisations that plot to overthrow the rule of the Imperium of Man from within. All planets and civilisations belonging to the Imperium can harbour Chaotic organisations, which themselves are as diverse in practice and membership as is imaginable. From the blood-soaked sacrificial cults of Feral Worlds to the philosophical secret societies of more advanced planets, the temptations of Chaos can capture all. The objective of the Chaos Cult is to survive and eventually dominate the society in which it dwells. Mere survival is particularly important on Imperial worlds, where Chaos worship is the greatest of heresies and Inquisitors are always vigilant and ready to wipe out any taint of Chaos.