One of the main factors leading to the collapse of USSR is soft and non-military aspect. Unlike western and US attitude toward USSR's disintegration that attributes this event to themselves and their measures especially soft and media war, Islamic revolution of Iran has been ignored while it is the most basic phenomenon that has deeply influenced disintegration of USSR.
Two key factors should be studied in soft disintegration of USSR: 1-waves of Islamic revolution of Iran that mostly covers Muslim community of USSR 2-measures of west during cold war especially US that covered especially non-Muslim community of USSR. This article is based on this hypothesis that waves of Islamic revolution of Iran and western soft/cold war are among the fundamental factors of USSR's soft disintegration.