Former KGB agent Yuri Bezmenov exposes the four stages of a Communist takeover of a country

Yuri Bezmenov explaining the 4 stages of ideological subversion
1 - Demoralization - takes 15 to 20 years
2 - Destabilization - takes 2 to 5 years
3 - Crisis - up to 6 weeks
4 - Normalization - when your country is basically taken over, living under a new ideology and reality