Yusuf al-Qaradawi (Arabic: يوسف القرضاوي) (born September 9, 1926) is a Muslim scholar and preacher best known for his popular al-Jazeera program, ash-Shariah wal-Hayat (“Shariah and Life”), and his website IslamOnline, which was launched in 1997. He has also published some fifty books, including The Lawful and the Prohibited in Islam and Islam: The Future Civilization. Qaradawi is controversial: among Muslims he is widely considered a moderate conservative, while many Western critics regard him as dangerously radical or as a supporter of violence. Some Muslim opponents see him as lax and influenced by Western ideas.
Much more at Wikipedia (http://en.wikipedia.org/wiki/Yusuf_al-Qaradawi).