Changes

Many new alien races and civilisations are discovered by Imperial [[Explorator]]s every year. For the most part, these aliens are ignored, contained, or if they present a threat to mankind or the Imperium, eradicated. Throughout its history the Imperium has fought many long wars with dangerous alien species. In most cases the Imperium has eventually won, but in some, the threat has only managed to be contained.{{Fn|2}}

Although friendly dealings with aliens is almost unthinkable, [[Rogue Trader]]s are allowed to barter and trade with aliens.{{Fn|12}} Some xenos civilizations even exist within Imperial space with the expressed permission of authorities, such as the [[Squat]] [[Ironhead Prospector]]s of [[Necromunda (Planet)|Necromunda]] (though officially these are classified as a type of [[Abhuman]]).{{Fn|14}} However overall the Imperium strictly prohibits any dealings with Xenos, and the charge of consorting with aliens (dubbed ''xenophilia'') will result in one being branded a [[Heretic]] and exterminated.{{Fn|15}}