What is the history of cultism in the world?

Cultism has a long history, often emerging from religious, social, or political movements. Ancient civilizations, including those in Egypt and Greece, had secretive groups with esoteric beliefs and practices. In the modern era, cults have gained notoriety, particularly in the 20th century, with high-profile groups like the People's Temple and the Branch Davidians, often characterized by charismatic leaders and strict adherence to doctrines. The term "cult" itself has evolved, sometimes used pejoratively to describe groups perceived as dangerous or unorthodox.