Stages of communist takeovers with Yuri Bezmenov
Yuri Bezmenov was the son of a high-ranking Soviet General who began his formal KGB (communist Soviet intelligence) training in the early 1960's. When he was ready, he "worked" as a journalist, when in actuality he was responsible for propaganda and subversion inside the nations in which he worked.
Bezmenov breaks the communist takeover into 4 distinct stages:
Demoralization, Destabilization, Crisis, and Normalization.