Ultimate authority in Iran is held by Ayatollah Ali Khameini, who has held the position of Supreme Leader since 1989. 

Iranians who protest injustices are often the victims of violent suppression. protesters who were met with violence include, “Several Iranian veterans protesting in front of the Iranian Parliament over the government’s failure to pay bonuses and .....
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https://raisethevoices.org/2022/08/03/the-current-state-of-human-rights-in-iran/