A "doomsday cult" is a group of people who believe in a particular set of beliefs about the end of the world and who follow a leader or leaders with the same beliefs. These beliefs often include things like the end of the world will happen soon and that they must do something specific in order to be saved. Some cults will even encourage their followers to act in violent ways in order to achieve their goals. Cult members also may be asked to give up possessions or follow an extreme diet. The goal of these cults is usually to prepare people for the end of the world and help them survive whatever catastrophic event may come.