Adventism is a Christian movement which began in the 19th century, in the context of the Second Great Awakening revival in the United States. The name refers to belief in the imminent Second Coming (or "Second Advent") of Jesus Christ. It was started by William Miller, whose followers became known as Millerites. Today, the largest church within the movement is the Seventh-day Adventist Church.

The Adventist family of churches is regarded today as conservative Protestants. Although these churches hold much in common, their theology differs on whether the intermediate state is unconscious sleep or consciousness, whether the ultimate punishment of the wicked is annihilation or eternal torment, the nature of immortality, whether or not the wicked are resurrected after the millennium, and whether the sanctuary of Daniel 8 refers to the one in heaven or one on earth. The movement has encouraged the examination of the New Testament, leading them to observe the Sabbath.

Adventism began as an inter-denominational movement. Its most vocal leader was William Miller. Between 50,000 and 100,000 people in the United States supported Miller's predictions of Christ's return. After the "Great Disappointment" of October 22, 1844 many people in the movement gave up on Adventism. Of those remaining Adventist, the majority gave up believing in any prophetic (biblical) significance for the October 22 date, yet they remained expectant of the near Advent (second coming of Jesus). Of those who retained the October 22 date, many maintained that Jesus had come not literally but "spiritually", and consequently were known as "spiritualizers". A small minority held that something concrete had indeed happened on October 22, but this event had been misinterpreted. This viewpoint later emerged and crystallized with the Seventh-day Adventist Church, the largest remaining body today.

Doug Batchelor (born March 9, 1957) is an evangelist of the Seventh-day Adventist Church and author of several books including The Richest Caveman. His primary ministry is Amazing Facts - a worldwide television and radio broadcast ministry based in Sacramento, California. He also pastors the Sacramento Central Seventh-day Adventist Church. Batchelor is the son of the Florida aviation tycoon and philanthropist George Batchelor and the Hollywood film critic, actress and songwriter Ruth Batchelor. He spent his youth searching for the purpose of life, and, while living in a cave in southern California, he found a Bible that ultimately changed his life^{[citation needed]}.

Doug Batchelor is the speaker of the weekly TV program Amazing Facts Presents which can be seen weekly on national cable networks. He is also the speaker on Bible Answers Live a one-hour paid radio program heard over 100 radio stations across the United States and on satellite radio around the world.

As a pastor, Batchelor can also be seen when speaking at the Sacramento Seventh-day Adventist Church which is aired as Central Study Hour and Everlasting Gospel on TV locally and by satellite on 3ABN and Hope Channel.

David Asscherick is the co-founder and director of ARISE Institute. He is the former (from 2002 to 2007) pastor of the Troy Seventh-day Adventist Church in Troy, Michigan. He has been featured on 3ABN and Hope Channel and has been a regular presenter at the annual Generation of Youth for Christ conferences.

He is a former punk rocker, professional skateboarder and rock climber. Asscherick became a Christian at the age of 23. "He later converted to Adventism, became a pastor without completing college, [and] started the ARISE Institute"