Since 2017 Qatar has been subject to a boycott by Saudi Arabia, the UAE, Bahrain and Egypt (The Arab Quartet), creating a deep rift in a region already beset by civil wars and insurgencies.
Jane Kinninmont and Neil Quilliam explore reasons behind the rift and how the boycott has created ripple effects across the Middle East and Horn of Africa, and has divided the Gulf Cooperation Council (GCC), hitherto one of the only functioning regional organizations in the Arab world.