These worlds are populated by tribal peoples largely living without the assistance of maintained technology. This may be due to a failed colonisation project, religious preferences, cultural choice, environment or some other reason. They may be aware of the Imperium in some fashion but are unlikely to know much more than something about a large group of distant people living in the stars. These planets are frequently unsuitable for later colonisation, either due to the circumstances which drove the natives feral or because the natives themselves actively resist new people settling on their lands. People of feral worlds can range widely in culture, from Grox-hunting tribes of ancestor worshippers to wild-eyed, post-apocalyptic road warriors, fighting endlessly amongst the toxic, sand-strewn ruins of their civilisation.