Ex KGB agent Alexandrovich Bezmenov explains the 4 stages of ideological subversion

Yuri Alexandrovich Bezmenov explains the 4 stages of ideological subversion needed for a communist takeover. Yuri was formerly a KGB agent who then defected to the west. He went on to write many anti-communist works before he died of an alleged heart attack in 1993, he was 54 years old.