Islamic fundamentalism, expression of Islam that stresses strict and literal adherence to a set of basic principles. As with other religions, multiple fundamentalist movements have taken form throughout Islamic history, the earliest of which may have been the Kharijites of the 7th century. While these movements may share characteristics and draw on common religious materials and motifs, they are often disparate movements without direct connection to one another and occasionally at odds. Among the most influential Islamic fundamentalist movements in modern times are the Islamist movement, the Wahhābī movement, the Salafi movement, the Principlist faction in Iran, Boko Haram in Nigeria, and the Taliban in Afghanistan.
In fact, the character of Islamic fundamentalism varies greatly throughout the world. Some fundamentalists resort to terrorism, and some do not. Some espouse leftist political and economic programs, borrowing ideas from Marxism and other varieties of socialism, while others favour free-market capitalism. Most fundamentalists, however, insist on conformity to a code of conduct based on a literal interpretation of sacred scripture. Many also insist that religion encompasses all aspects of life and, hence, that religion and politics cannot be separated. Like most fundamentalists, they generally have a dualistic worldview: they believe that they are engaged in a holy war, or jihad, against their evil enemies, whom they often portray as pawns of Jewish and Masonic conspiracies in terms taken directly from the anti-Semitic literature of 20th-century Europe. Messianism, which plays an important role in Christian, Jewish, and Shiʿi Islamic fundamentalism, is less important in the fundamentalism of the Sunni branch of Islam.
Islamic fundamentalist movements have been politically significant in most Muslim countries primarily because they articulate political and social grievances better than do the established secular parties, some of which (e.g, many leftist parties) were discredited following the collapse of communism in eastern Europe and the Soviet Union in 1990–91. For example, Islamism, which is grounded in the modernist thought of Jamāl al-Dīn al-Afghānī (1838–97) and Muḥammad ʿAbduh (1849–1905), has produced localized movements such as Ennahda in Tunisia or Hamas in the Palestinian territories, which have primarily responded to current issues through an Islamic lens. Although the governments of Saudi Arabia and other oil-producing countries of the Persian Gulf region have represented themselves as conforming strictly to Islamic law, they continue to face internal opposition from Islamist movements for their pro-Western political and economic policies, the extreme concentration of their countries’ wealth in the hands of the ruling families, and, in the Islamists’ view, their rulers’ immoral lifestyles.
The subject of Islamic fundamentalism attracted a great deal of attention in the West after the Iranian Revolution of 1978–79—which deposed Iran’s ruler, Mohammad Reza Shah Pahlavi (1919–80), and established an Islamic republic—and especially after the September 11 attacks on the United States in 2001 by al-Qaeda, an international Islamist terrorist network. The spectacular nature of these events may have lent plausibility to the common but mistaken belief in the West that Islam and Islamic fundamentalism are closely connected if not identical.