The following are Arab states:
The borders of the various states were drawn up by European colonial powers in the 19th and 20th centuries. They are often straight lines drawn on a map with complete disregard to the geographic and demographic characteristics of the land. After World War II, there was a movement called Pan-Arabism that sought to unite all Arab countries into one political entity. Only Syria, Iraq and Egypt attempted the short-lived unification.
The various Arab states maintain close ties. Various national identities have been greatly strengthened by political realities in the past 60 years, making a single Arab nation less and less feasible.