Sayyid Qutb (1906–1966) was the chief spokesman for the Muslim Brotherhood in Egypt in the 1950s and 1960s. His books provided Islamic fundamentalism with its most important intellectual base. He was twice imprisoned by Nasser and was executed in 1966 for plotting against the government. He is often referred to as a martyr of the Islamic revival, and has had a major influence upon Islamic revivalism today, including the more militant groups such as Al-Jihad and the assassins of Anwar al-Sadat. The author presents an in-depth discussion of Qutb's life and writings, and focuses on the political and intellectual foundations of fundamentalism. He also analyzes Qutb's seven principles of the oneness of God (the tawhid).