Geopolitical Evolution of the last Decade of the 20th. Century and their Impacts upon the national Security of the I.R. Iran

Early in the 1990s. The world was faced with a new and unusual of incidence, known a collapse of the soviet union, that occurred not because of interference of any foreign power, but simply on the basis of ruptures in the inter political, social, military and cultural structure of the union at the same time changing the bipolarity and balance of power to lake of polarity and fluidity in international relation. Under the circumstance every one of the great powers, having in mind. Their own interest tried assume responsibility abilities of the disappeared power they filling the vacancy created by its abs sense. The desire for superiority confided. The clash of interest and the resulting anarchy created irregularities such as American invasion of Iraq on the exclude of the liberating Kuwait-occupied by Iraq the September 2001, etc. Consequently, the study of the results of the breakdown of the eastern black and the geopolitical development, of the 1990s, particularly their impact, in the middle east, remain the main point of interest in the minds of treachery, of the middle east problems. The present article having in mind the studying the effect of the development upon interests of the Iran in the area put forth the following theory:1- After collapse of the Soviet Union the geopolitical frontiers of the us. Has reached the geopolitical frontiers of Russian.2- The spatial expansion of America has resulted in physical siege of Iran, thus increasing its security expenditures. In the opinion of the author, in order to reduce the security cost it is advisable to consider adoption of alliance and collation policies.