David Koresh was an American cult leader who played a central role in the Waco siege of 1993. As the head of the Branch Davidians, a religious sect and offshoot of the Seventh-day Adventists, Koresh claimed to be its final prophet. His apocalyptic Biblical teachings, including interpretations of the Book of Revelation and the Seven Seals, attracted various followers.

A cult is a group which is typically led by a charismatic and self-appointed leader, who tightly controls its members, requiring unwavering devotion to a set of beliefs and practices which are considered deviant. It is in most contexts a pejorative term, also used for a new religious movement or other social group which is defined by its unusual religious, spiritual, or philosophical beliefs and rituals, or its common interest in a particular person, object, or goal. This sense of the term is weakly defined – having divergent definitions both in popular culture and academia – and has also been an ongoing source of contention among scholars across several fields of study.