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Dictatorship has all of the countries power in the government. With that gone, there will be no power, or an anarchy.
The Shah was very unpopular with many Iranians. Iran is a very traditional Muslim nation, and many of the Iranian people were displeased with the changes the Shah imposed upon them. Many people close to the Shah were corrupt. Anyone who disagreed with the Shah was forced to leave the nation or face SAVAK, the Shah’s brutal secret police
Due to Union measures such as the Confiscation Acts and Emancipation Proclamation in 1863