A "Worldwide Caliphate" is the concept of a single theocratic one-world government as proposed by some Islamic extremists in their efforts to overthrow the world's current political systems. The Daily Times reported that at a rally held in Islamabad[when?] the militant organization Sipah-e-Sahaba Pakistan called for the formation of a Worldwide Caliphate, which was to begin in Pakistan.
Hizb ut-Tahrir believes that all Muslims should unite in a worldwide caliphate that will "challenge, and ultimately conquer, the West." While extremists commit atrocities in pursuit of this unlikely goal, it lacks appeal among a wider Islamic audience. Brigitte Gabriel argues that the goal of a worldwide caliphate is central to the enterprise of radical Islam.
"As a universal religion, Islam envisages a global political order in which all humankind will live under Muslim rule as either believers or subject communities. In order to achieve this goal it is incumbent on all free, male, adult Muslims to carry out an uncompromising struggle 'in the path of Allah,' or jihad. This in turn makes those parts of the world that have not yet been conquered by the House of Islam an abode of permanent conflict (Dar al-Harb, the house of War) which will only end with Islam's eventual triumph."
- Phares, Walid (2008). The Confrontation: Winning the War against Future Jihad: Defeating the Next Generation of Jihad. Palgrave Macmillan. p. 32. ISBN 978-0230603899.
- Oliver-Dee, Sean (2009). The Caliphate Question: The British Government and Islamic Governance. Lexington. p. 9. ISBN 978-0739136010.
- "Hizb ut-Tahrir Emerges in America". Anti-Defamation League. 25 July 2013.
- Fagan, Geraldine (2012). Believing in Russia: Religious Policy After Communism. Routledge. p. 157. ISBN 978-0415490023.
- James Brandon (May 10, 2006). "The Caliphate: One nation, under Allah, with 1.5 billion Muslims". The Christian Science Monitor (Amman, Jorday). Retrieved May 26, 2012.
- Karl Vick (Jan 14, 2006). "Reunified Islam: Unlikely but Not Entirely Radical". The Washington Post. Retrieved May 26, 2012.
- Brigitte Gabriel (2008). They Must Be Stopped: Why We Must Defeat Radical Islam and How We Can Do It. St. Martin's Press. p. 10. ISBN 0312383630.
- Karsh, Efraim (2007). Islamic Imperialism: A History. Yale University Press. p. 64. ISBN 978-0300122633.