King taught a belief in reincarnation based on the "Law of Karma" according to which we progress life by life towards the goal of perfection. Everyone is destined eventually to become a Master and to continue evolving from there. The society claims that evolution also includes planet Earth, which is regarded as a living entity at a much higher state of evolution and importance than its inhabitants. They allege that because of the backward evolution of humans, the Earth has been under frequent attacks from evil forces from other parts of the universe and that the Cosmic Masters of other planets are fighting off a number of evil alien invaders. In Aetherius Society literature, the cosmic battles with evil forces or intelligence "bear some resemblance to the fundamentalist Christian concept of ‘spiritual warfare', shorn of its imminent apocalyptic content."