According to British writer David Icke, 5 to 12-foot (1.5 - 3.7 m) tall, blood-drinking, shape-shifting reptilian humanoids from the Alpha Draconis star system, now hiding in underground bases in Hollow Earth, are the force behind a worldwide conspiracy directed at humanity. He contends that most of the world's leaders are related to these reptilians. Icke's conspiracy theories now have supporters in 47 countries and he frequently gives lectures to crowds of 2,500 or more. American writer Vicki Santillano ranked the notion that "Reptilian humanoids control all of us" as the 10th most popular conspiracy theory The term or title antichrist, in Christian theology, is a leader who fulfills Biblical prophecies concerning an adversary of Christ, while resembling him in a deceptive manner. The antichrist will seemingly provide for the needs of the people but deny the ultimate salvation. The term "antichrist" appears five times in 1 John and 2 John of the New Testament — once in plural form and four times in the singular.