Politics in the Islamic Republic of Iran are dictated by factionalism. All political parties were banned in the Islamic Republic in 1987. Today, several political factions encapsulate the political landscape in the Persian country,[1][2] and scholars such as Maziar Behrooz, Behzad Nabavi, Bahman Baktiari, Maaike Warnaar, Payam Mohseni, have given different formulations of them, varying in number (usually between three and five) and orientation (ideological purity vs. pragmatism, support for political and religious freedom vs. authoritarianism, support for regulation and intervention in the marketplace vs. laissez faire policies).
According to at least one source, (Alireza Nader, David E. Thaler and S. R. Bohandy), political factions hold more sway than Iran's "relatively weak elected institutions" in decision making and policy making,[3] especially under Supreme Leader Ali Khamenei (i.e. after 1990).[4]