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
Wealthy citizens. Progressive taxes are basically income tax. The less income you generate the less you have to pay with taxes. The more income you make, the more you have to pay in taxes.
The Cultural Revolution was a wildly complex program that failed for a variety of complex reasons, but the best option from this list is "<span>people began to seriously question communism"</span>
It showed that the north and the south were divided.