Editing Prime minister (section)

===Modern usage===
[[File:Royal Decree no 08231772 of 07.08.2023 (Cambodia).jpg|thumb|Royal decree appointing the Prime Minister of Cambodia in 2023]]
In the late 20th century,<ref>{{cite book|editor1-last=Arjomand|editor1-first=Saïd Amir|title=Constitutionalism and political reconstruction|date=2007|publisher=Brill|isbn=978-9004151741|pages=92–94|chapter-url=https://books.google.com/books?id=kYmmnYKEvE0C&pg=PA94|author1=Julian Go|chapter=A Globalizing Constitutionalism?, Views from the Postcolony, 1945-2000|access-date=27 February 2016|archive-url=https://web.archive.org/web/20160306121536/https://books.google.co.uk/books?id=kYmmnYKEvE0C&lpg=PA93&ots=nOUN11pmfK&pg=PA94|archive-date=6 March 2016|url-status=live}}</ref><ref>{{cite web|title=How the Westminster Parliamentary System was exported around the World|url=http://www.cam.ac.uk/research/features/how-the-westminster-parliamentary-system-was-exported-around-the-world|publisher=University of Cambridge|access-date=16 December 2013|date=2 December 2013|archive-url=https://web.archive.org/web/20131216190945/http://www.cam.ac.uk/research/features/how-the-westminster-parliamentary-system-was-exported-around-the-world|archive-date=16 December 2013|url-status=live}}</ref> many of the world's countries had prime ministers or equivalent ministers, holding office under either [[constitutional monarchies]] or ceremonial presidents. The main exceptions to this system include Switzerland and the United States, as well as the presidential republics in Latin America, such as Chile and Mexico, modelled on the U.S. system in which the president directly exercises executive authority.

[[Bahrain]]'s former prime minister, [[Sheikh]] [[Khalifah bin Sulman Al Khalifah]], occupied the post for about 50 years, from 1970 to November 2020, making him the longest serving non-elected prime minister.